This PPT gives a brief description about Geomatics, the disciplines and techniques constituting Geomatics, Geographic Information System or GIS, GIS data (Spatial Data and Non- Spatial Data), GIS data models, GIS application in Petroleum Exploration, Coordinate System, Geodetic Datum and ArcGIS.
This document discusses geo-referencing raster data. It defines geo-referencing as aligning raster data to real-world coordinates so it can be viewed and analyzed with other geographic data. There are two main types of geo-referencing: absolute, which aligns raster to maps or coordinates, and relative, which aligns raster to other geo-referenced raster. The document outlines the geo-referencing process, including selecting ground control points, performing transformations, and interpreting error metrics to evaluate accuracy.
Geomatics is the discipline of gathering, storing, processing, and delivering geographic information or spatially referenced information. It involves topics such as geodesy, topography, land surveying, cartography, photogrammetry, remote sensing, GPS, laser scanning, GIS, decision support systems, expert systems, and webGIS. Geomatics uses techniques from geography, computer science, and ontology to systematically collect, integrate, analyze, and distribute geospatial data for applications such as climate change monitoring, resource management, urban planning, and more.
The document discusses various methods of georeferencing, which is assigning accurate locations to spatial information. The most comprehensive method is using latitude and longitude, which defines locations based on angles from the equator and Greenwich Meridian. However, the Earth's curved surface poses issues for technologies that work with flat maps and data. Therefore, map projections are used to translate locations on the spherical Earth onto flat planes or surfaces, though all projections introduce some distortion. Common projections include cylindrical, conic, and the Universal Transverse Mercator system.
Map projections allow the representation of locations on the spherical Earth on a flat surface by transforming geospatial coordinates using mathematical formulas. There are different types of map projections that preserve various geometric properties to differing degrees, such as distance, shape, or direction. It is important to choose a projection and coordinate system that suit the intended mapping purpose. Coordinate systems use datums to define relationships between coordinates and locations on the Earth's irregular surface.
Remote sensing and GIS techniques are useful tools for civil engineering projects. There are several models that can be used to represent the shape of the Earth, including flat, spherical, and ellipsoidal models. The ellipsoidal model is needed for accurate measurements over long distances. A geodetic datum defines the parameters of the reference ellipsoid and the orientation of the coordinate system grid. Common datums include NAD27 and NAD83, and transformations allow conversion between them. Map projections, such as Mercator and UTM, are used to represent the 3D Earth on a 2D surface, inevitably distorting some spatial properties like shape, area, or distance.
Understanding Coordinate Systems and Projections for ArcGISJohn Schaeffer
Everything you need to know to work with coordinate systems and projecting data in ArcGIS. The presentation starts by explaining the terminology, and then discusses the details you need to know to actually work successfully with coordinate systems, use the proper projections, and geographic transformations. This is a very practical look at a complex subject.
The Integration of Geospatial Technologies: GIS and GPS Lindsey Landolfi
This document discusses the integration of Geographic Information Systems (GIS) and Global Positioning Systems (GPS). It describes how GIS and GPS technologies can be combined in various ways, including data-focused integration where GPS data is collected in the field and later imported into a GIS database, and technology-focused integration where GPS capabilities are fully embedded within a GIS application. The benefits of integration include improved data accuracy and increased productivity. Examples of integrated GIS and GPS applications in use by government agencies are provided.
This document discusses GIS data analysis techniques including raster to vector conversion and spatial analysis through vector overlay. It provides information on various data types and models in GIS. Key analysis techniques covered are raster and vector data overlays, terrain mapping and analysis, and spatial interpolation methods. Specific vector and raster overlay methods like point-in-polygon, line-in-polygon and polygon-on-polygon are described. Spatial data editing techniques involving digitization errors and topological/non-topological editing are also summarized.
This document discusses geo-referencing raster data. It defines geo-referencing as aligning raster data to real-world coordinates so it can be viewed and analyzed with other geographic data. There are two main types of geo-referencing: absolute, which aligns raster to maps or coordinates, and relative, which aligns raster to other geo-referenced raster. The document outlines the geo-referencing process, including selecting ground control points, performing transformations, and interpreting error metrics to evaluate accuracy.
Geomatics is the discipline of gathering, storing, processing, and delivering geographic information or spatially referenced information. It involves topics such as geodesy, topography, land surveying, cartography, photogrammetry, remote sensing, GPS, laser scanning, GIS, decision support systems, expert systems, and webGIS. Geomatics uses techniques from geography, computer science, and ontology to systematically collect, integrate, analyze, and distribute geospatial data for applications such as climate change monitoring, resource management, urban planning, and more.
The document discusses various methods of georeferencing, which is assigning accurate locations to spatial information. The most comprehensive method is using latitude and longitude, which defines locations based on angles from the equator and Greenwich Meridian. However, the Earth's curved surface poses issues for technologies that work with flat maps and data. Therefore, map projections are used to translate locations on the spherical Earth onto flat planes or surfaces, though all projections introduce some distortion. Common projections include cylindrical, conic, and the Universal Transverse Mercator system.
Map projections allow the representation of locations on the spherical Earth on a flat surface by transforming geospatial coordinates using mathematical formulas. There are different types of map projections that preserve various geometric properties to differing degrees, such as distance, shape, or direction. It is important to choose a projection and coordinate system that suit the intended mapping purpose. Coordinate systems use datums to define relationships between coordinates and locations on the Earth's irregular surface.
Remote sensing and GIS techniques are useful tools for civil engineering projects. There are several models that can be used to represent the shape of the Earth, including flat, spherical, and ellipsoidal models. The ellipsoidal model is needed for accurate measurements over long distances. A geodetic datum defines the parameters of the reference ellipsoid and the orientation of the coordinate system grid. Common datums include NAD27 and NAD83, and transformations allow conversion between them. Map projections, such as Mercator and UTM, are used to represent the 3D Earth on a 2D surface, inevitably distorting some spatial properties like shape, area, or distance.
Understanding Coordinate Systems and Projections for ArcGISJohn Schaeffer
Everything you need to know to work with coordinate systems and projecting data in ArcGIS. The presentation starts by explaining the terminology, and then discusses the details you need to know to actually work successfully with coordinate systems, use the proper projections, and geographic transformations. This is a very practical look at a complex subject.
The Integration of Geospatial Technologies: GIS and GPS Lindsey Landolfi
This document discusses the integration of Geographic Information Systems (GIS) and Global Positioning Systems (GPS). It describes how GIS and GPS technologies can be combined in various ways, including data-focused integration where GPS data is collected in the field and later imported into a GIS database, and technology-focused integration where GPS capabilities are fully embedded within a GIS application. The benefits of integration include improved data accuracy and increased productivity. Examples of integrated GIS and GPS applications in use by government agencies are provided.
This document discusses GIS data analysis techniques including raster to vector conversion and spatial analysis through vector overlay. It provides information on various data types and models in GIS. Key analysis techniques covered are raster and vector data overlays, terrain mapping and analysis, and spatial interpolation methods. Specific vector and raster overlay methods like point-in-polygon, line-in-polygon and polygon-on-polygon are described. Spatial data editing techniques involving digitization errors and topological/non-topological editing are also summarized.
This document provides an introduction to Geographic Information Systems (GIS) concepts and software. It outlines key learning objectives which are to understand what a GIS is and how it is applied, gain an understanding of basic GIS concepts and vocabulary, and get hands-on experience using GIS software to make basic maps and integrate data from different sources. The document then covers fundamental GIS topics like what GIS is, common questions it can help answer, its software components, vector and raster data models, coordinate systems, cartography principles for map design, and exercises for using GIS software to create maps.
This document discusses orthophotos. It explains that orthophotos are orthographic photographs that do not contain scale, tilt, or relief distortions unlike typical perspective photos. Orthophotos are produced through a process called differential rectification that eliminates image displacements and variations in terrain. The document notes that orthophotos can be used as maps for direct measurements and have pictorial qualities while also being used as basemaps for field observations and in geographic information systems.
Errors and biases in GPS measurements arise from a variety of sources including satellite positions, weather, multipath, timing errors, and signal propagation through the atmosphere. These errors are broadly classified as those originating from satellites (ephemeris, clock errors), receivers (clock errors, multipath, noise), and signal propagation (ionospheric and tropospheric delays). Selective availability intentionally added error for non-authorized users until being discontinued in 2000. Differential GPS and other techniques can help reduce or eliminate some biases to achieve sub-meter accuracy.
This document discusses differential GPS (DGPS), which improves the accuracy of GPS positioning. It works by using a stationary GPS receiver at a known location to calculate error corrections, which are transmitted to a roving receiver to improve its position accuracy. DGPS can reduce GPS errors from sources like atmospheric delays, satellite orbit issues, and multipath effects, providing sub-meter accuracy compared to the 5-10 meter accuracy of standard GPS. It allows real-time position correction or post-processed correction through data from a fixed base station.
This document provides an overview of cartography and mapmaking. It discusses the processes involved, such as data collection, design, and reproduction. It covers the uses and functions of maps, different types of maps and symbols used. It also explains important concepts like map projections and technological changes in the field. The document highlights both the advantages of maps in conveying spatial information efficiently, as well as their limitations in providing complete accuracy.
This document provides an overview of maps and map projections. It defines what a map is, discusses scale and map projections, and classifies the main types of projections as cylindrical, conic, and planar. It then describes some commonly used projections in more detail, like the Mercator, UTM grid, Lambert Conformal Conic, and Albers Equal-Area Conic projections. The document concludes that map projections transform the spherical Earth into a flat plane and are fundamental to mapmaking.
This document discusses map projections, which are methods for translating the three-dimensional surface of the Earth onto a two-dimensional map. It describes three types of developable projection surfaces - conic, cylindrical, and planar - that are used to create different map projections. Specific projections are then outlined, including what geometric properties they preserve or distort (shape, area, distance, direction) and their common uses. The document provides a detailed overview of different GIS map projection techniques.
The document provides an overview of photogrammetry, which is the science and technology of obtaining reliable spatial information about physical objects and the environment through analyzing photographs. It discusses the different types of photogrammetry including aerial/spaceborne photogrammetry and close-range photogrammetry. It also summarizes the key techniques, applications, and products of photogrammetry such as digital terrain models, orthophotos, and 3D models.
This document provides an introduction to geographic information systems (GIS). It begins by defining some basic map concepts like features, scale, and symbology. It then discusses what GIS is, how it works, and what makes it special. GIS allows users to capture, store, manipulate, analyze and visualize spatial data. It integrates data from different sources into interactive maps. Users can perform tasks like querying attributes, analyzing networks, modeling 3D surfaces, interpolating between data points, and complex spatial analysis. Overall, the document outlines the core components and capabilities of GIS as a tool for visualizing and solving real-world problems involving geographic data.
A map projection is a systematic transformation of the latitudes and longitudes of locations from the surface of a sphere or an ellipsoid into locations on a plane. Maps cannot be created without map projections.
Here are the key points discussed in the document:
- Cadastral maps show property boundaries, ownership details, and other land information to facilitate administration of lands. This assists with land valuation and taxation.
- They use accurate surveying and mapping techniques to precisely depict parcel boundaries, dimensions, and relationships. Features like roads, buildings, and natural landmarks are also shown.
- Non-spatial data layers provide additional details like ownership records, tax values, land use, and addresses to supplement the spatial data on boundaries and features.
- Standard cartographic elements like titles, legends, scales, projections, and sheet layouts are applied. The north arrow orients the entire map while parcel numbering uniquely identifies each property.
This document provides an overview of cartography and mapmaking. It discusses the cartographic process, which involves collecting and organizing data, designing maps, and reproducing maps. It also describes the uses and functions of maps, different map types and symbols, various map projections, and technological changes in the field. The document outlines advantages and limitations of maps and concludes that cartography involves the theory and practice of mapmaking to effectively communicate spatial information.
Distortions and displacement on aerial photographchandan00781
This document discusses various types of distortions that can occur in aerial photographs. It defines distortion as a shift in the position of landscape features that alters the perspective of the image. Displacement is defined as any shift that does not change the perspective. The document outlines different types of distortions including lens distortion, relief displacement caused by elevation differences, and tilt distortions from aircraft motion like roll, crab, and pitch. It also discusses parallax, orthorectification to remove distortions, and parameters that influence relief displacement.
Remote sensing involves obtaining information about objects without physical contact. It works by sensing and recording electromagnetic radiation reflected or emitted from targets. The key components are an energy source, sensor, platforms, and data analysis to extract information. Sensors can be optical, thermal, or microwave. Platforms include satellites, aircraft, and ground bases. Applications of remote sensing include agriculture, forestry, geology, hydrology, urban planning, and national security.
Application of gis & rs in urban planning sathish1446
Remote sensing uses sensors aboard satellites or aircraft to acquire spatial, spectral and temporal data about objects without physical contact. This data is digitized and processed into images. GIS is a system that integrates hardware, software and data to capture, store, analyze and display spatial or geographic information. Remote sensing and GIS are useful tools for urban planning applications such as land use/cover mapping, environmental monitoring, updating basemaps, studying urban growth, transportation systems, and site suitability analysis. GIS allows for overlaying of maps, buffering, and route analysis to support zoning, land management, emergency response and other planning needs. Together, remote sensing and GIS provide timely, reliable spatial data and analysis functions for addressing challenges
This document provides an overview of ground truthing for remote sensing. It defines ground truth as observations or measurements made near the Earth's surface to support air or space-based remote sensing. Ground truth is collected using tools like GPS, radiometers, cameras, and topographic maps. It involves field observations, spectral measurements, location coordinates and sample collection to validate remote sensing data and reduce classification errors. The process of ground truthing helps verify pixel contents on satellite images and assess classification accuracy.
The document discusses the application of remote sensing and geographical information systems (GIS) in civil engineering. It provides definitions of remote sensing as remotely sensing objects on Earth and GIS as a system to capture, store, analyze and present geographically referenced data. The document outlines some basic concepts of GIS including its origins from technologies like computer-aided cartography and databases. It also discusses data types in GIS like spatial data, attributes and different data models. Common software, functional elements and applications of GIS in areas like facilities management and environmental planning are summarized as well.
Uttam Pudasaini gives a presentation on geomatics, which involves determining the precise position of objects on Earth and representing spatial information digitally. Geomatics incorporates fields like geodesy, surveying, GPS, remote sensing, photogrammetry, GIS and programming for spatial data analysis. It is a rapidly developing industry focused on collecting and analyzing location-based information. Geomatics engineers design systems to gather and study data about land, oceans, natural resources and man-made structures to support decision-making. The career was entered due to advice, scholarships and its dynamic nature combining mathematics, computers, travel and policy work.
This document discusses different types of map projections, including cylindrical, equal-area, and transverse Mercator projections. It provides properties and examples of each type. Specifically, it describes simple cylindrical projections as having straight parallels and meridians intersecting at right angles, with consistent distances but scale distortion away from the equator. It also outlines cylindrical equal-area projections as having decreasing distances between parallels but increasing distances between meridians, making it an equal-area projection but distorted at the poles. Finally, it explains transverse Mercator and Universal Transverse Mercator (UTM) projections use a 2D Cartesian system to locate positions on Earth within zones with minimal distortion.
Projecting maps involves converting the spherical earth into a flat plane, which inevitably causes some distortion of properties like angles, areas, directions, and shapes. There are three main types of map projections - cylindrical, conical, and planar - which involve wrapping a lighted globe onto different geometric surfaces like a cylinder, cone, or flat plane. The Mercator projection specifically was created to aid navigation by representing lines of constant bearing as straight lines, though it distorts the relative sizes of land areas farther from the equator. The Universal Transverse Mercator (UTM) system divides the earth into zones and uses the Mercator projection locally in each to assign Cartesian coordinates.
Remote sensing and geographic information systems (GIS) analysis involves the use of technology to gather, manipulate, and analyze spatial data to understand a range of phenomena. Remote sensing entails obtaining information about the Earth's surface by examining data acquired by a device, which is at a distance from the surface, most often satellites orbiting the earth and airplanes. GIS are computer-based systems that are used to capture, store, analyze, and display geographic information. These two approaches are used widely, often together, to assess natural resources and monitor environmental changes. Social scientists can gain insights into fine spatial and temporal dynamics of a range of social phenomena in environmental contexts by analyzing time series of remote sensing data, by linking remote sensing to socioeconomic data using GIS, and developing with these data a range of digital models and analyses. This article examines remote sensing and GIS in general, with an emphasis on the former, and then explores how these approaches may be used together to address a range of issues. It also emphasizes the role of remote sensing and GIS for use by scientists, engineers & geologists in water resources management
Geographical Information System By Zewde Alemayehu Tilahun.pptxzewde alemayehu
This document provides an overview of Geographic Information Systems (GIS). It discusses key GIS concepts such as geographic phenomena, data types and structures, coordinate systems, map projections, and spatial analysis. GIS is defined as an integrated system for capturing, storing, analyzing and managing data which is spatially referenced to Earth. The document also outlines common data collection methods, applications of GIS, and its ability to answer questions about location, attributes, trends and patterns across geographic space.
This document provides an introduction to Geographic Information Systems (GIS) concepts and software. It outlines key learning objectives which are to understand what a GIS is and how it is applied, gain an understanding of basic GIS concepts and vocabulary, and get hands-on experience using GIS software to make basic maps and integrate data from different sources. The document then covers fundamental GIS topics like what GIS is, common questions it can help answer, its software components, vector and raster data models, coordinate systems, cartography principles for map design, and exercises for using GIS software to create maps.
This document discusses orthophotos. It explains that orthophotos are orthographic photographs that do not contain scale, tilt, or relief distortions unlike typical perspective photos. Orthophotos are produced through a process called differential rectification that eliminates image displacements and variations in terrain. The document notes that orthophotos can be used as maps for direct measurements and have pictorial qualities while also being used as basemaps for field observations and in geographic information systems.
Errors and biases in GPS measurements arise from a variety of sources including satellite positions, weather, multipath, timing errors, and signal propagation through the atmosphere. These errors are broadly classified as those originating from satellites (ephemeris, clock errors), receivers (clock errors, multipath, noise), and signal propagation (ionospheric and tropospheric delays). Selective availability intentionally added error for non-authorized users until being discontinued in 2000. Differential GPS and other techniques can help reduce or eliminate some biases to achieve sub-meter accuracy.
This document discusses differential GPS (DGPS), which improves the accuracy of GPS positioning. It works by using a stationary GPS receiver at a known location to calculate error corrections, which are transmitted to a roving receiver to improve its position accuracy. DGPS can reduce GPS errors from sources like atmospheric delays, satellite orbit issues, and multipath effects, providing sub-meter accuracy compared to the 5-10 meter accuracy of standard GPS. It allows real-time position correction or post-processed correction through data from a fixed base station.
This document provides an overview of cartography and mapmaking. It discusses the processes involved, such as data collection, design, and reproduction. It covers the uses and functions of maps, different types of maps and symbols used. It also explains important concepts like map projections and technological changes in the field. The document highlights both the advantages of maps in conveying spatial information efficiently, as well as their limitations in providing complete accuracy.
This document provides an overview of maps and map projections. It defines what a map is, discusses scale and map projections, and classifies the main types of projections as cylindrical, conic, and planar. It then describes some commonly used projections in more detail, like the Mercator, UTM grid, Lambert Conformal Conic, and Albers Equal-Area Conic projections. The document concludes that map projections transform the spherical Earth into a flat plane and are fundamental to mapmaking.
This document discusses map projections, which are methods for translating the three-dimensional surface of the Earth onto a two-dimensional map. It describes three types of developable projection surfaces - conic, cylindrical, and planar - that are used to create different map projections. Specific projections are then outlined, including what geometric properties they preserve or distort (shape, area, distance, direction) and their common uses. The document provides a detailed overview of different GIS map projection techniques.
The document provides an overview of photogrammetry, which is the science and technology of obtaining reliable spatial information about physical objects and the environment through analyzing photographs. It discusses the different types of photogrammetry including aerial/spaceborne photogrammetry and close-range photogrammetry. It also summarizes the key techniques, applications, and products of photogrammetry such as digital terrain models, orthophotos, and 3D models.
This document provides an introduction to geographic information systems (GIS). It begins by defining some basic map concepts like features, scale, and symbology. It then discusses what GIS is, how it works, and what makes it special. GIS allows users to capture, store, manipulate, analyze and visualize spatial data. It integrates data from different sources into interactive maps. Users can perform tasks like querying attributes, analyzing networks, modeling 3D surfaces, interpolating between data points, and complex spatial analysis. Overall, the document outlines the core components and capabilities of GIS as a tool for visualizing and solving real-world problems involving geographic data.
A map projection is a systematic transformation of the latitudes and longitudes of locations from the surface of a sphere or an ellipsoid into locations on a plane. Maps cannot be created without map projections.
Here are the key points discussed in the document:
- Cadastral maps show property boundaries, ownership details, and other land information to facilitate administration of lands. This assists with land valuation and taxation.
- They use accurate surveying and mapping techniques to precisely depict parcel boundaries, dimensions, and relationships. Features like roads, buildings, and natural landmarks are also shown.
- Non-spatial data layers provide additional details like ownership records, tax values, land use, and addresses to supplement the spatial data on boundaries and features.
- Standard cartographic elements like titles, legends, scales, projections, and sheet layouts are applied. The north arrow orients the entire map while parcel numbering uniquely identifies each property.
This document provides an overview of cartography and mapmaking. It discusses the cartographic process, which involves collecting and organizing data, designing maps, and reproducing maps. It also describes the uses and functions of maps, different map types and symbols, various map projections, and technological changes in the field. The document outlines advantages and limitations of maps and concludes that cartography involves the theory and practice of mapmaking to effectively communicate spatial information.
Distortions and displacement on aerial photographchandan00781
This document discusses various types of distortions that can occur in aerial photographs. It defines distortion as a shift in the position of landscape features that alters the perspective of the image. Displacement is defined as any shift that does not change the perspective. The document outlines different types of distortions including lens distortion, relief displacement caused by elevation differences, and tilt distortions from aircraft motion like roll, crab, and pitch. It also discusses parallax, orthorectification to remove distortions, and parameters that influence relief displacement.
Remote sensing involves obtaining information about objects without physical contact. It works by sensing and recording electromagnetic radiation reflected or emitted from targets. The key components are an energy source, sensor, platforms, and data analysis to extract information. Sensors can be optical, thermal, or microwave. Platforms include satellites, aircraft, and ground bases. Applications of remote sensing include agriculture, forestry, geology, hydrology, urban planning, and national security.
Application of gis & rs in urban planning sathish1446
Remote sensing uses sensors aboard satellites or aircraft to acquire spatial, spectral and temporal data about objects without physical contact. This data is digitized and processed into images. GIS is a system that integrates hardware, software and data to capture, store, analyze and display spatial or geographic information. Remote sensing and GIS are useful tools for urban planning applications such as land use/cover mapping, environmental monitoring, updating basemaps, studying urban growth, transportation systems, and site suitability analysis. GIS allows for overlaying of maps, buffering, and route analysis to support zoning, land management, emergency response and other planning needs. Together, remote sensing and GIS provide timely, reliable spatial data and analysis functions for addressing challenges
This document provides an overview of ground truthing for remote sensing. It defines ground truth as observations or measurements made near the Earth's surface to support air or space-based remote sensing. Ground truth is collected using tools like GPS, radiometers, cameras, and topographic maps. It involves field observations, spectral measurements, location coordinates and sample collection to validate remote sensing data and reduce classification errors. The process of ground truthing helps verify pixel contents on satellite images and assess classification accuracy.
The document discusses the application of remote sensing and geographical information systems (GIS) in civil engineering. It provides definitions of remote sensing as remotely sensing objects on Earth and GIS as a system to capture, store, analyze and present geographically referenced data. The document outlines some basic concepts of GIS including its origins from technologies like computer-aided cartography and databases. It also discusses data types in GIS like spatial data, attributes and different data models. Common software, functional elements and applications of GIS in areas like facilities management and environmental planning are summarized as well.
Uttam Pudasaini gives a presentation on geomatics, which involves determining the precise position of objects on Earth and representing spatial information digitally. Geomatics incorporates fields like geodesy, surveying, GPS, remote sensing, photogrammetry, GIS and programming for spatial data analysis. It is a rapidly developing industry focused on collecting and analyzing location-based information. Geomatics engineers design systems to gather and study data about land, oceans, natural resources and man-made structures to support decision-making. The career was entered due to advice, scholarships and its dynamic nature combining mathematics, computers, travel and policy work.
This document discusses different types of map projections, including cylindrical, equal-area, and transverse Mercator projections. It provides properties and examples of each type. Specifically, it describes simple cylindrical projections as having straight parallels and meridians intersecting at right angles, with consistent distances but scale distortion away from the equator. It also outlines cylindrical equal-area projections as having decreasing distances between parallels but increasing distances between meridians, making it an equal-area projection but distorted at the poles. Finally, it explains transverse Mercator and Universal Transverse Mercator (UTM) projections use a 2D Cartesian system to locate positions on Earth within zones with minimal distortion.
Projecting maps involves converting the spherical earth into a flat plane, which inevitably causes some distortion of properties like angles, areas, directions, and shapes. There are three main types of map projections - cylindrical, conical, and planar - which involve wrapping a lighted globe onto different geometric surfaces like a cylinder, cone, or flat plane. The Mercator projection specifically was created to aid navigation by representing lines of constant bearing as straight lines, though it distorts the relative sizes of land areas farther from the equator. The Universal Transverse Mercator (UTM) system divides the earth into zones and uses the Mercator projection locally in each to assign Cartesian coordinates.
Remote sensing and geographic information systems (GIS) analysis involves the use of technology to gather, manipulate, and analyze spatial data to understand a range of phenomena. Remote sensing entails obtaining information about the Earth's surface by examining data acquired by a device, which is at a distance from the surface, most often satellites orbiting the earth and airplanes. GIS are computer-based systems that are used to capture, store, analyze, and display geographic information. These two approaches are used widely, often together, to assess natural resources and monitor environmental changes. Social scientists can gain insights into fine spatial and temporal dynamics of a range of social phenomena in environmental contexts by analyzing time series of remote sensing data, by linking remote sensing to socioeconomic data using GIS, and developing with these data a range of digital models and analyses. This article examines remote sensing and GIS in general, with an emphasis on the former, and then explores how these approaches may be used together to address a range of issues. It also emphasizes the role of remote sensing and GIS for use by scientists, engineers & geologists in water resources management
Geographical Information System By Zewde Alemayehu Tilahun.pptxzewde alemayehu
This document provides an overview of Geographic Information Systems (GIS). It discusses key GIS concepts such as geographic phenomena, data types and structures, coordinate systems, map projections, and spatial analysis. GIS is defined as an integrated system for capturing, storing, analyzing and managing data which is spatially referenced to Earth. The document also outlines common data collection methods, applications of GIS, and its ability to answer questions about location, attributes, trends and patterns across geographic space.
Geographical information system by zewde alemayehu tilahunzewde alemayehu
The document summarizes key concepts related to Geographic Information Systems (GIS). It discusses what GIS is, its components and applications. It also covers geographic phenomena, data types, coordinate systems, and methods for data entry, preparation and analysis in GIS.
Geographic Information System for Bachelor in Agriculture EngineeringDinesh Bishwakarma
This document discusses the application of geographic information systems (GIS) and remote sensing in agriculture. It defines GIS as a system used to input, store, retrieve, manipulate, analyze and output geospatial data to support decision making. The key components of GIS are described as hardware, software, data, people, and methods. Remote sensing is defined as the non-contact recording of electromagnetic spectrum information using sensors from platforms like aircraft or satellites, and analyzing the data using image processing. Common applications of remote sensing and GIS in agriculture include crop mapping and monitoring, soil analysis, and precision farming.
This document provides an overview of geoinformatics, which involves the use of information technology for geospatial data. It discusses key components of geoinformatics like geography, remote sensing, GPS, GIS, cartography, geodesy, and photogrammetry. These components are used for collecting, analyzing, storing, and disseminating spatial information about the Earth. The document also outlines some applications of geoinformatics in fields like emergency services, public health, transportation, and military. Overall, geoinformatics allows for analyzing and visualizing geospatial data to better understand and make decisions about the Earth.
Geographic Information System (GIS) is a computer system for capturing, storing, analyzing and managing data and associated attributes which are spatially referenced to the Earth. GIS allows users to visually see relationships, patterns and trends hidden within geographic datasets. It allows analysis and output of geographically referenced data. GIS also refers to spatial information systems and the tools used to gather, store, retrieve, analyze and display geographic or spatial data.
A geographic information system (GIS) is a computer system for capturing, storing, analyzing and displaying spatial data. It allows users to create interactive queries (spatial data analysis) and maps from a variety of sources. GIS technologies include mapping software and its application with remote sensing, land surveying, aerial photography. Some key uses of GIS are in telecommunications network planning, environmental impact analysis, urban planning, agriculture, and regional planning.
Geoinformatics refers to the science of processing geospatial data for storage, analysis, and presentation. It involves acquiring, managing, analyzing, modeling, and developing tools for geospatial data. The three main components of geoinformatics are geographical information systems (GIS), remote sensing, and global positioning systems (GPS). GIS stores, analyzes, and displays both spatial and non-spatial data. Remote sensing acquires information about objects from a distance by analyzing the electromagnetic energy returned from objects. GPS provides precise location information expressed as latitude and longitude by measuring signals from satellites. Geoinformatics has many applications in fields like urban planning, environmental analysis, agriculture, and more.
This document provides an overview of a course on Geographical Information Systems (GIS). It discusses the course title, code, semester, and units which include an introduction to GIS and its components. The document then describes technologies used for spatial data like GPS, remote sensing, and GIS. It provides examples of how these technologies work and their applications. Finally, the document summarizes the functions of GIS like data collection, management, analysis, and visualization.
Application of gis and gps in civil engineeringAvinash Anand
A geographic information system (GIS) is a system designed to capture, store, manipulate, analyze, manage, and present geographical data. GIS integrates geospatial software and tools to enable spatial analysis and the display of large datasets in graphical form. GIS can be used for problem solving, decision making, and visualizing spatial data by mapping locations, quantities, densities, and changes over time for various applications like transportation, watershed analysis, land use planning, and more.
GEOSPATIAL TECHNOLOGY, CONCEPT, TECHNIQUES AND ITS COMPONENTS. pptxMalothSuresh2
Geospatial technology involves three major components: Geographic Information Systems (GIS), Global Positioning Systems (GPS), and Remote Sensing (RS). GIS is used for geospatial analysis and mapping across many industries. GPS uses satellites to determine location on Earth. Remote sensing collects imagery from space and aircraft. Together these tools capture spatial data to analyze resources and make informed decisions.
Introduction to various GIS software, google earth. Intro types, types of maps, map projections and hands on to Q GIS software. Introduction to latitude longitude system, shape file generation, geo referencing and digitization.
TYBSC IT PGIS Unit I Chapter I- Introduction to Geographic Information SystemsArti Parab Academics
A Gentle Introduction to GIS The nature of GIS: Some fundamental observations, Defining GIS, GISystems, GIScience and GIApplications, Spatial data and Geoinformation. The real world and representations of it: Models and modelling, Maps, Databases, Spatial databases and spatial analysis
This document provides an overview of geographical information systems (GIS) and their concepts. It discusses that GIS allows for the integration of spatial and non-spatial data in a digital format to aid decision making. Key points include that GIS represents geographic features as vector or raster data, integrates data from different sources by georeferencing to a common coordinate system, and can perform spatial analysis and modeling to answer questions about patterns and relationships. GIS is a useful tool for tasks like natural resource management, precision agriculture, and land use planning.
The document provides an introduction to geographic information systems (GIS) and remote sensing. It discusses how GIS organizes and analyzes spatial data through data management, analysis, and visualization. It describes different data types including vector, raster, and imagery data. It also explains key concepts such as layers, modeling geospatial reality, and coding vector and raster data. The document outlines advantages and disadvantages of vector and raster data models. It introduces remote sensing and describes platforms and sensors used to collect spatial data from aircraft and satellites.
GIS.INTRODUCTION TO GIS PACKAGES &GEOGRAPHIIC ANALYSISTessaRaju
A geographic information system (GIS) allows users to integrate and analyze spatial data from a variety of sources through mapping and visualization. GIS provides tools to gather, store, retrieve, analyze and output geographic data. Spatial analysis techniques in GIS, such as buffering, proximity analysis and overlay analysis, enable users to model and understand relationships within and between spatial datasets to gain insights and solve problems.
A resource for Interdisciplinary LearningAnchalChadha6
Coordinate geometry uses a system of x and y coordinates to determine the exact location of points on a plane. It has many applications, including calculating distances and sizes of shapes, defining locations using latitude and longitude, air traffic control, map projections, computer graphics, robotics, and art. Geometry underlies key technologies like GPS, digital files, video games, and more.
This document discusses healthcare analytics. It begins by defining healthcare analytics as focusing on technologies and processes that measure, manage, and analyze healthcare data to enable more effective and efficient operational and clinical decisions. It then outlines the objectives of healthcare analytics as making decisions data-driven, transparent, verifiable, and robust. The document describes the main types of analytics as descriptive, predictive, diagnostic, and prescriptive. It also lists some common sources of healthcare data and how healthcare companies use analytics to reduce costs, improve patient outcomes, and conduct randomized clinical trials. Emerging technologies discussed include big data, AI/ML, blockchain, and AR/VR. Finally, some existing healthcare analytics tools on the market are briefly described.
SQL: Structured Query Language
Includes:
Introduction
It is a computer programming language that is used for storage, retrieval and manipulation of data that is stored in relational database. This is a standard computer programming language used for RDMS (Relational Database Management Systems).
IBM’s Ted Cod a.k.a Father of Relational databases gave the concept of relational model for database in 1970. It was 4 years later SQL appeared in 1974. This was just an idea, which got conceptualized in the form of Systems/R in 1978 and was released by IBM. The ANSI standards and first prototype of relational databases was released in 1986, which is popularly knows as Oracle
Advantages:
Used for accessing data in RDBMS.
Used for describing data.
Definition of data and its manipulation.
Can be used with other programming language by embedding SQL modules into other languages code, pre-compilers and libraries.
Possible to create and drop data base using this programming language.
Setting permission on views, table and procedures.
Can be used for creating views, procedures and functions.
Commands
Commands in SQL are categorized into three category namely
DDL – Data definition language
DML – Data Manipulation language
DCL – Data Control language
Data Definition Language (DDL)
Commands that are classified under DDL category are as follows:
CREATE – Used for creating an object, table/view.
ALTER – Used for modifying an existing database object.
DROP – Object, table an views created using CREATE can be deleted/removed.
Data Manipulation Language (DML)
Commands that are classified under DML are as follows:
SELECT – Used for retrieving a set of records from one/more than one tables.
DELETE – Used for deleting records.
UPDATE – Used for modifying / updating records.
INSERT – Used for inserting records.
Data Control Language (DCL)
Commands that have been classified under DCL are:
GRANT – Users can be granted permission / privileges using this command
REVOKE – Privileges to the user can be taken back using this command.
Constraints
Rules are enforced on the columns of the table that contain data specific for the field for all the record in the table. These rules are referred to as constraints, which are generally used to ensure that field only gets a particular type of value. For instance if there is a field called “Age” in the table, then this field can only take numeric value.
Constraints set up for the table apply to all the data stored in the table.
Some of the common constraints are:
NOT NULL:
This constraints ensure that the field value is never set to NULL
DEFAULT:
Typically used to fill in a default value for any field left blank.
UNIQUE:
If the constraints is set on a column, then all value set for this field will have to be unique
Contents:
Behavior Driven Development (BDD)
Features of BDD
BDD Tools
BDD Framework
Examples of Cucumber/SpecFlow/BDD test
Gherkin – BDD Language
The Problem
Example of Gherkin
The Conclusion
SpecFlow Feature File
Keywords for the Feature File creation
A brief summary of Oil and Gas Upstream. PPT includes basic Chemistry, Basic Geology, Oil formation, Migration of Petroleum, Reservoir, porosity, permeability, Geological structures for petroleum entrapment, Exploration methods, Geological methods, Geophysical methods, geophysical methods, seismic methods, seismic methods, gravity methods, magnetic methods, well drilling, preparation to drill, setting the rig, drilling, enhanced oil recovery, EOR, primary oil recovery, secondary oil recovery, thermal recovery, gas injection and chemical injection
An Overview of CNG and PNG
Compressed Natural Gas (CNG): is natural gas compressed to a pressure of 200-250 Kg/cm² (g) (due to its low density) to enhance the vehicle onboard storage capacity. Thus, the compressed form of natural gas is used as a fuel for transportation purposes.
At present CNG Retail Outlets of GAIL and Its JVCs are available in Delhi, Maharastra, Uttar Pradesh, Gujarat, Andhra Pradesh, Tripura, and Madhya Pradesh States with more than 400 CNG Retail outlets catering to approximately 6,80,000 vehicles.
Indraprastha Gas Ltd, a JV of GAIL (India) Ltd, has 209 CNG Retail outlets and Mahanagar Gas Ltd another JV of GAIL (India) Ltd has set up 148 CNG stations
Similarly, other JVCs like MNGL has 13 Outlets, BGL has 14 outlets , GGL with 10 outlets each, and AGL & CGUL with 9 retail outlets each and TNGCL with one outlet.
GAIL Gas Limited, a wholly owned subsidiary of GAIL (India) Limited has currently 17 CNG outlets at Dewas, Sonepat, Kota, Meerut, Vijaipur, Dibiyapur, Firozabad, Vadodara and Panvel. It will be commissioning its other outlets very soon.
Piped Natural Gas (PNG) is natural gas used as a fuel for households, Industries (with a demand of less than 50000 scmd) and commercial units
Problem of odor pollution and its management solutionRohit Bisht
The term odour refers to perception regarding smell or scientifically it can be called as “a sensation resulting from the reception of stimulus by the olfactory sensory system”. It can be unpleasant or pleasant but it is caused by inhaling air borne inorganics or organics.
The ever growing population, urbanization and industrialisation has led to odour problem which has increased in to a large proportion and thus a need to control the problem has risen. The major reason of odour problem is no proper sanitation facilities for urbanization. Industrialisation is taking place at a very fast pace and it has added to the problem. Undesirable odour detoriates the air quality and affects the human lifestyle. Odour problem is one the most complex form of pollution.
Effects of the falling price on the global economyRohit Bisht
The document discusses the effects of falling oil prices on the global economy. It states that the large drop in oil prices from $115 per barrel to $60 is mainly due to increased supply, especially from the growth of shale oil production in North America. For oil importing countries, lower prices mean economic benefits through lower costs and more consumption, but oil exporters will see reduced revenues and slower GDP growth. The document also notes that lower inflation results from falling oil costs.
Hero Honda was a successful joint venture between Hero Cycles of India and Honda of Japan from 1984 until 2010 when disagreements over sharing technology and merging spare parts business led Honda to terminate the partnership. As separate companies, Hero MotoCorp has expanded to three manufacturing facilities with an annual production capacity of 3 million motorcycles and 1 million per year, while maintaining its position as one of the largest two-wheeler manufacturers in India.
This document discusses maintenance management. It outlines different types of maintenance including breakdown, preventive, predictive, routine, and planned maintenance. The objectives of maintenance are to minimize downtime and costs while keeping assets operational. Maintenance involves civil, mechanical, and electrical areas. A key point is that total maintenance costs include commitment costs, preventive maintenance costs, and breakdown costs, with the optimal policy balancing these to achieve the lowest overall costs.
Temple of Asclepius in Thrace. Excavation resultsKrassimira Luka
The temple and the sanctuary around were dedicated to Asklepios Zmidrenus. This name has been known since 1875 when an inscription dedicated to him was discovered in Rome. The inscription is dated in 227 AD and was left by soldiers originating from the city of Philippopolis (modern Plovdiv).
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxEduSkills OECD
Iván Bornacelly, Policy Analyst at the OECD Centre for Skills, OECD, presents at the webinar 'Tackling job market gaps with a skills-first approach' on 12 June 2024
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 𝟏)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
2. Definitions
2
Geomatics is defined as a systemic, multidisciplinary, integrated approach to
selecting the instruments and the appropriate techniques for collecting, storing,
integrating, modelling, analyzing, retrieving at will, transforming, displaying and
distributing spatially georeferenaced data from different sources with well-
defined accuracy characteristics, continuity and in a digital format.
Rohit Bisht
3. Disciplines
and
Techniques
Constituting
Geomatics
Computer science: to represent and process applicable information through the
development of technological instruments (i.e. hardware) and of methods, models
and systems (i.e. software).
Geodesy: to determine the shape and size of the Earth; it defines on the one hand the
surface of reference in its complete form, the geoid, as well as in its simplified form,
the ellipsoid, and on the other hand the external gravitational field as a function of
time.
Topography: started with and part of geodesy, this is a combination of procedures for
direct land survey. Topography is a combination of methods and instruments to
comprehensively measure and represent details of the Earth’s surface:
• Planimetry: to determine the relative positions of the representation of points
on the Earth’s surface with respect to the same reference surface;
• Altimetry: to determine the height of the points on the Earth’s surface with
respect to the geoid surface;
• Tachymetry: for the planimetric and altimetric survey of the Earth’s surface
zones;
• Land surveying: to measure areas, moving and rectify borders, levelling zones
of the Earth physical surface.
3Rohit Bisht
4. Disciplines
and
Techniques
Constituting
Geomatics
(cont.)
Cartography: to supply a possible description of the shape and dimension of the
Earth and its natural and artificial details, by means of graphical or numerical
representation of more or less wide areas, following fixed rules.
Photogrammetry: to determine the position and shapes of the objects by measuring
them on photographic images.
Remote Sensing: to remotely acquire territorial and environmental data and to
combine methods and techniques for subsequent processing and interpretation (this
definition also fits digital photogrammetry).
Global Positioning System (GPS): to provide the three-dimensional (3D) position of
fixed or moving objects, in space and time, all over the Earth’s surface, under any
meteorological conditions and in real time.
Laser scanning system: to locate objects and measure their distance by means of the
incident radiation in the optical frequencies (0.3–15 μm) of the electromanetic
spectrum.
4Rohit Bisht
5. Disciplines
and
Techniques
Constituting
Geomatics
(cont.)
Geographical Information System (GIS): to make use of a powerful combination of
instruments capable of receiving, recording, recalling, transforming, representing and
processing georeferenced spatial data.
Decision Support System (DSS): to implement complex Geographical Information
Systems, meant to create possible scenarios by modelling the ground truth and to
offer a set of solutions to the decision maker.
Expert System (ES): to consider instruments capable of imitating the experts’
cognitive processes and their ability to manage the complexity of reality by means of
interdependent processes of abstraction, generalization and approximation.
WebGIS: to distribute geographic data remotely stored on dedicated machines for
databases, according to complex network architectures.
Ontology: to specify a conceptuality, i.e. the description of concepts and relation-
ships existing for an element or among various elements of a group, entity or class;
conceptualization is an abstract simplified vision of the world to be represented for a
given application.
5Rohit Bisht
6. Knowing
“Where”
is
Important
Why:
Path: What path the hurricane is
taking ?
Evacuations: How the evacuation
should take place, what route should
be taken ?
Damage: What is the total damage ?
Utilities: Which utilities have been
impacted and how we replace or fix or
get those utilities back online to
minimize the impact on the populous ?
Since almost everything happens
somewhere, knowing where that
something happens is critical
For example, Hurricane Irene:
6Rohit Bisht
8. What is a GIS?
Geographic
Information
System
Developed to help
capture, model, store,
manage, and present
infinitely complex
systems.
8
GIS does this by allowing us to break up the landscape into multiple layers or breaking it down into
multiple layers so that we can better understand and see relationships between those layers a graphic
in the middle of the screen shows a number of layers including parcels, zoning, floodplains,
watersheds, land cover, soils topography and so on pulling all of that data apart and then mixing it
back together we can start to tease out different relationships that we may not have seen before and
really help us understand and break down complex systems
Rohit Bisht
9. GIS Data
Spatial
Data
Spatial Data have unique geographic coordinates that allow the data to be
located in geographic space.
9
Now we use spatial data in everyday life, whenever
• we open google maps we are using spatial data, every time you look at your phone and open an app
it generally use some sort of spatial data.
• Credit card the company know where you are
• Navigation system uses spatial data.Rohit Bisht
10. GIS Data
Non-
Spatial
Data
Spatial Data typically has associated non-spatial data that describes the
event or object
10
Attribute Data (non-spatial)
Type Color LastFix FlowRat
e (gpm)
Repair
Fire
Hydrate
Red 6/23/02 200 No
Rohit Bisht
11. GIS Data
Models
Vector Raster
Vector data are discrete
representations of
geospatial features
modeled as coordinate
pairs (x,y points)
connected by lines.
Raster data represent geospatial
features (or phenomenon) through
a series of grid cells or pixels
11Rohit Bisht
12. GIS Data Models
12
Data Models can represent
Houses, transportation networks, building footprints
and parcels arc can be vector data sets
While Raster data sets can represent elevation, aerial
photo, population density per sqr. mile
Rohit Bisht
13. GIS Applications in
Petroleum
Exploration
Exploration requires the analysis of a lot of different types of data such as
satellite imagery, digital aerial photo mosaics, seismic surveys, surface geology
studies, subsurface and cross section interpretations and images, well
locations, and existing infrastructure information. A GIS can tie these data
together to the location in question and allow you to overlay, view, and
manipulate the data in the form of a map to thoroughly analyze the potential
for finding new potential. Geologists, geophysicists, engineers and petro-
physicists usually perform exploration evaluation.
13Rohit Bisht
14. Coordinate
System
A system that uses coordinates to establish position, a method of
representing features in a space of given dimensions by coordinates
from an origin
14
Coordinate system is related to the real world through a datum and the datum provides a relationship of
the coordinate system to the real world. The earth is not a sphere. It is irregular in shape thus making
calculating the coordinates and altitudes a lot difficult. The earth shape or geoid and the reference point
used in map preparation is called datum. A common horizontal datum in US is the North American datum
of 1983.
Thus map makers or topographers or GIS chose the datum for the area they are mapping. The first thing
is to select the ellipsoid and then selecting the most appropriate mapping of the spherical coordinate
system onto the selected ellipsoid.
Reference mostly used is the Geographic Coordinate system = Longitude and latitude represents angels
and Prime meridian and equator are the reference plains used to define this angel, any point on the earth
surface can be represented using longitude and latitude. Prime Meridian is the royal observatory,
Greenwich (England) also known as International Date Line (IDL)Rohit Bisht
15. Geodetic Datum
A reference datum is a known and constant surface which is used to
describe the location of unknown points on the earth.
Horizontal datum's are used for describing a point on the earth’s
surface, in latitude and longitude or another coordinate system.
Vertical datum's measures elevations or depths
15
Current use of GIS and GPS software has increase the awareness of storing the datum and ellipsoid for
Longitude and latitude. Knowing the datum and ellipsoid that your longitude and latitude has been stored
in, can make a big difference in the position of the feature. If the get data that was collected World
geodetic Datum(WGS84) and you tell the GIS that the data has been stored in north America datum
(NAD27) then it will show the position in the wrong location. Geographic coordinate stored in Longitude
and latitude angels Can be projected in other coordinate system so here comes ArcGIS are tool box to
perform this task.
Rohit Bisht
16. ArcGIS
16
ArcGIS Desktop: two primary modules (MS only)
Arc Map: For data display, map production, spatial analysis, data
editing
Arc Catalog: For data management and preview
Arc Toolbox: For specialized data conversions and analyses,
available as a window in both
Rohit Bisht
Editor's Notes
geos: Earth, matics: informatics
The term geomatics was created at Laval University in Canada in the early 1980s
Computer science: to represent and process applicable information through the development of technological instruments (i.e. hardware) and of methods, models and systems (i.e. software).
Geodesy: to determine the shape and size of the Earth; it defines on the one hand the surface of reference in its complete form, the geoid, as well as in its simplified form, the ellipsoid, and on the other hand the external gravitational field as a function of time.
Topography: started with and part of geodesy, this is a combination of procedures for direct land survey. Topography is a combination of methods and instruments to comprehensively measure and represent details of the Earth’s surface:
planimetry: to determine the relative positions of the representation of points on the Earth’s surface with respect to the same reference surface;
• altimetry: to determine the height of the points on the Earth’s surface with respect to the geoid surface;
• tachymetry: for the planimetric and altimetric survey of the Earth’s surface zones;
• land surveying: to measure areas, moving and rectify borders, levelling zones of the Earth physical surface.
Cartography: to supply a possible description of the shape and dimension of the Earth and its natural and artificial details, by means of graphical or numerical representation of more or less wide areas, following fixed rules.
Photogrammetry: to determine the position and shapes of the objects by measur- ing them on photographic images.
Remote Sensing: to remotely acquire territorial and environmental data and to combine methods and techniques for subsequent processing and interpretation (this definition also fits digital photogrammetry).
Global Positioning System (GPS): to provide the three-dimensional (3D) position of fixed or moving objects, in space and time, all over the Earth’s surface, under any meteorological conditions and in real time.
Laser scanning system: to locate objects and measure their distance by means of the incident radiation in the optical frequencies (0.3–15 μm) of the electromanetic spectrum.
Geographical Information System (GIS): to make use of a powerful combination of instruments capable of receiving, recording, recalling, transforming, represent- ing and processing georeferenced spatial data.
Decision Support System (DSS): to implement complex Geographical Information Systems, meant to create possible scenarios by modelling the ground truth and to offer a set of solutions to the decision maker.
Expert System (ES): to consider instruments capable of imitating the experts’ cognitive processes and their ability to manage the complexity of reality by means of interdependent processes of abstraction, generalization and approximation.
WebGIS: to distribute geographic data remotely stored on dedicated machines for databases, according to complex network architectures.
Ontology: to specify a conceptuality, i.e. the description of concepts and relation- ships existing for an element or among various elements of a group, entity or class; conceptualization is an abstract simplified vision of the world to be repre- sented for a given application.
Computer science: to represent and process applicable information through the development of technological instruments (i.e. hardware) and of methods, models and systems (i.e. software).
Geodesy: to determine the shape and size of the Earth; it defines on the one hand the surface of reference in its complete form, the geoid, as well as in its simplified form, the ellipsoid, and on the other hand the external gravitational field as a function of time.
Topography: started with and part of geodesy, this is a combination of procedures for direct land survey. Topography is a combination of methods and instruments to comprehensively measure and represent details of the Earth’s surface:
planimetry: to determine the relative positions of the representation of points on the Earth’s surface with respect to the same reference surface;
• altimetry: to determine the height of the points on the Earth’s surface with respect to the geoid surface;
• tachymetry: for the planimetric and altimetric survey of the Earth’s surface zones;
• land surveying: to measure areas, moving and rectify borders, levelling zones of the Earth physical surface.
Cartography: to supply a possible description of the shape and dimension of the Earth and its natural and artificial details, by means of graphical or numerical representation of more or less wide areas, following fixed rules.
Photogrammetry: to determine the position and shapes of the objects by measur- ing them on photographic images.
Remote Sensing: to remotely acquire territorial and environmental data and to combine methods and techniques for subsequent processing and interpretation (this definition also fits digital photogrammetry).
Global Positioning System (GPS): to provide the three-dimensional (3D) position of fixed or moving objects, in space and time, all over the Earth’s surface, under any meteorological conditions and in real time.
Laser scanning system: to locate objects and measure their distance by means of the incident radiation in the optical frequencies (0.3–15 μm) of the electromanetic spectrum.
Geographical Information System (GIS): to make use of a powerful combination of instruments capable of receiving, recording, recalling, transforming, represent- ing and processing georeferenced spatial data.
Decision Support System (DSS): to implement complex Geographical Information Systems, meant to create possible scenarios by modelling the ground truth and to offer a set of solutions to the decision maker.
Expert System (ES): to consider instruments capable of imitating the experts’ cognitive processes and their ability to manage the complexity of reality by means of interdependent processes of abstraction, generalization and approximation.
WebGIS: to distribute geographic data remotely stored on dedicated machines for databases, according to complex network architectures.
Ontology: to specify a conceptuality, i.e. the description of concepts and relation- ships existing for an element or among various elements of a group, entity or class; conceptualization is an abstract simplified vision of the world to be repre- sented for a given application.
Computer science: to represent and process applicable information through the development of technological instruments (i.e. hardware) and of methods, models and systems (i.e. software).
Geodesy: to determine the shape and size of the Earth; it defines on the one hand the surface of reference in its complete form, the geoid, as well as in its simplified form, the ellipsoid, and on the other hand the external gravitational field as a function of time.
Topography: started with and part of geodesy, this is a combination of procedures for direct land survey. Topography is a combination of methods and instruments to comprehensively measure and represent details of the Earth’s surface:
planimetry: to determine the relative positions of the representation of points on the Earth’s surface with respect to the same reference surface;
• altimetry: to determine the height of the points on the Earth’s surface with respect to the geoid surface;
• tachymetry: for the planimetric and altimetric survey of the Earth’s surface zones;
• land surveying: to measure areas, moving and rectify borders, levelling zones of the Earth physical surface.
Cartography: to supply a possible description of the shape and dimension of the Earth and its natural and artificial details, by means of graphical or numerical representation of more or less wide areas, following fixed rules.
Photogrammetry: to determine the position and shapes of the objects by measur- ing them on photographic images.
Remote Sensing: to remotely acquire territorial and environmental data and to combine methods and techniques for subsequent processing and interpretation (this definition also fits digital photogrammetry).
Global Positioning System (GPS): to provide the three-dimensional (3D) position of fixed or moving objects, in space and time, all over the Earth’s surface, under any meteorological conditions and in real time.
Laser scanning system: to locate objects and measure their distance by means of the incident radiation in the optical frequencies (0.3–15 μm) of the electromanetic spectrum.
Geographical Information System (GIS): to make use of a powerful combination of instruments capable of receiving, recording, recalling, transforming, represent- ing and processing georeferenced spatial data.
Decision Support System (DSS): to implement complex Geographical Information Systems, meant to create possible scenarios by modelling the ground truth and to offer a set of solutions to the decision maker.
Expert System (ES): to consider instruments capable of imitating the experts’ cognitive processes and their ability to manage the complexity of reality by means of interdependent processes of abstraction, generalization and approximation.
WebGIS: to distribute geographic data remotely stored on dedicated machines for databases, according to complex network architectures.
Ontology: to specify a conceptuality, i.e. the description of concepts and relation- ships existing for an element or among various elements of a group, entity or class; conceptualization is an abstract simplified vision of the world to be repre- sented for a given application.
Knowing the X Y cordinate or location or the spatial location that something happesn is extremely critical.
For example, a simple but very powerful example, the hurricane irene which impacted florida, there has been a number of hurricane that you can show, that indicate why knowing “where” is very important. So why would this be important because
What path the hurricane is taking
How the evacuation should take place, what route should be taken
What is the total damage
Which utilities have been impacted and how we replace or fix or get those utilites back online to minimize the impact on the populous
So knowing where is critical to really understand spatial analysis.
Spatial Thinking is thinking that finds meaning in the shape, size, orientation, location, direction or trajectory of objects, processes or phenomena
GIS was developed by ESRI (environmental system Research Institute) and has been around for the better part of 30 years.
Then say the definition
GIS does this by allowing us to break up the landscape into multiple layers or breaking it down into multiple layers so that we can better understand and see relationships between those layers a graphic in the middle of the screen shows a number of layers including parcels, zoning, floodplains, watersheds, land cover, soils topography and so on pulling all of that data apart and then mixing it back together we can start to tease out different relationships that we may not have seen before and really help us understand and break down complex systems
Example here is fire hydrate, here this fire hydrate is located in franklin, Idaho. And has a spatial location, this spatial data can be thought as data which can be actually mapped.
Now we use spatial data in everyday life, whenever
we open google maps we are using spatial data, every time you look at your phone and open an app it generally use some sort of spatial data.
Credit card the company know where you are
Navigation system uses spatial data.
Vector data are discrete representations of geospatial features modeled as coordinate pairs (x,y points) connected by lines.
Vector Advantages:
Precise location of features
Captures and stores many related attributes
Flexible and easy to edit/update
Compact storage of large amounts of data
Suited for analysis of areas, lengths, networks
Raster data represent geospatial features (or phenomenon) through a series of grid cells or pixels ,Each pixel represents a spatial location on the surface of the Earth
Data Models can represent
houses, transportation networks, building footprints and parcels anc can be vector data sets
While Raster data sets can represent elevation, aerial photo, population density per sqr. mile
Coordinate system is related to the real world through a datum and the datum provides a relationship of the coordinate system to the real world.
The earth is not a sphere. It is irregular in shape thus making calculating the coordinates and altitudes a lot difficult.
The earth shape or geoid and the reference point used in map preparation is called datum. A common horizontal datum in US is the North American datum of 1983.
Thus map makers or topographers or gis chose the datum for the area they are mapping. The first thing is to select the ellipsoid and then selecting the most appropriate mapping of the spherical coordinate system onto the selected ellipsoid.
Reference mostly used is the
Geographic Coordinate system = Longitude and latitude represents angels and Prime meridian and equator are the reference plains used to define this angel, any point on the earth surface can be represented using longitude and latitude. Prime Meridian is the royal observatory, Greenwich (England) also known as International Date Line (IDL)
Current use of GIS and GPS software has increase the awareness of storing the datum and ellipsoid for Longitude and latitude. Knowing the datum and ellipsoid that your longitude and latitude has been stored in, can make a big difference in the position of the feature. If the get data that was collected World geodetic Datum(WGS84) and you tell the GIS that the data has been stored in north America datum (NAD27) then it will show the position in the wrong location. Geographic coordinate stored in Longitude and latitude angels Can be projected in other coordinate system so here comes ArcGIS are tool box to perform this task.
ArcGIS is a comprehensive, integrated, scalable system designed to meet the needs of a wide range of GIS users. The three desktop GIS components of ArcGIS are:
ArcView
ArcEditor
ArcInfo
ArcView includes ArcCatalog, ArcMap, and ArcToolbox, which allow you to browse, manage, analyze, edit, and document your data.
ArcEditor has all the functionality of ArcView plus powerful tools for editing shapefiles and geodatabases.
ArcInfo provides the most functionality and includes all of the capabilities of ArcEditor plus additional geoprocessing tools and a full version of ArcInfo Workstation (comprised of ARC, ArcEdit, ArcPlot, INFO, and ARC Macro Language or AML).