Neogeography
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share

Neogeography

  • 397 views
Uploaded on

This presentation was given in a seminar in my college (under-grad). Thought of uploading it.

This presentation was given in a seminar in my college (under-grad). Thought of uploading it.

More in: Technology
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads

Views

Total Views
397
On Slideshare
397
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
5
Comments
0
Likes
1

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide
  • Today we are presenting a seminar on neogeography. Maps has been in use by the man for thousands of year. The early maps were handmade and were limited to his knowledge of the routes. Maps are still in use in todays world by people from various walks of life. The only difference is thjat maps then were hand made and not very realistical and accuarate but today with the expansion of technologies maps have been digitilised and have been analysed to such an extent such that almost anything and everything on this earth is now plottable. Maps now can be used in big configuartion machines like in nasa or in something as small as our cellphones.
  • DefinationAnd it was cartographers who starting making maps .. \m/
  • According to cartographers knowledge the maps were desgined .
  • 1. Since the maps started helping people to find other routes unexplored by them ; led to navigation .
  • Hence with navigation the cycle of discovery and exploration of world started .
  • Maps tilll today are being used by people as their travel guides .
  • Benchmarking , landmarking , routes.Pxomity of a particular place . We try to tell a route , is according to visualization to us . We tell that route wrt to landmarks and benchmarks that we have seen in surrounding area
  • 1.Extract meaningfull info from various maps built ..2.Reasons for GIS3.Satellite survey4.Industrial Revolution 5.Remote sensing.6.Toposheets- study abt the topograghyRoots not used yetAdvancement of technology , the map got digitalised , this version of maps was used for study of earth to very accurate detail in order to discover lands for mining , agricultural land , and also for surveys done wrt to population n plantation of a particular zone of an area . . . .
  • Visualization tool , DB , Map editing tools . . .
  • Sources of data - satellite , UAV , federal govt . ( ordanace survey of GB )
  • When point , line , polygon are used.Point benchmark Line river or a path to be traced Polygon refers to particular area in a given zone .
  • Area to be analysed as is taken as a collection of pixels , each location to be marked on the map , points to certainl cell in the grid , hence a pixel .Point is a cellLine is array of cells Polygon is zone of cells .Raster model is given more preference , since its highly detail oriented and accurate .
  • Geologist , botnonist , Archaelogic survey of India , disaster management so that precautions can be ,Railways , airports. Soil erosion , landslides . .. transportation . Etc etc . . .
  • GIS is confined to federal Govt org , Research instiutions like NASA , ISRO.
  • Objective of the GIS Wither be a survey , govt by remote sensing to understand particular portion of india . Hence lay down business rules and plans for operation of GIS .
  • Scenario:Read the books lines .Raw data processing , storing in DB and gives output as per requirement of the usr .
  • Modellingconsisit of 3 steps Headline , want to find shortest distance between ne 2 benchmarks , describe the spatial data associated with it .
  • Vector and raster model , as described earlier . In vector model , house shown as a polygon , In raster model its collection of pixels .
  • Once the data has been subsumed as a data , and appropriate model is stored in a DB . The tool highly used in GIS is ARCGIS .It uses GeoDB .
  • But first GIS software came only in late 1970s from the lab of the ESRI. Canada was the pioneer in the developmentEvery technology has its own growth period right from its inception till saturation , and GIS is no exception. As the adaptation increases ,the requirements for the particular tech also increases . Some requirements are tech based and some are perspective based .Some of these requirements eventually grow and become potential problems which would at somepoint become diffcult to address due to Lack of advanced techChange in perspectives which digresses into something else And theres a need for different perspectives .. And that’s where GIS comes to picture .GIS started 1990s and it was only confined to a partiucular sect of ppl and was used for purposes of universal importance
  • .Propriety data sets Steep learning curveMoney + time costTool centric and not user centric
  • Propriety data sets ESRI ( Economic and Social Research institute )AutoDeskData confined to govt institutions , NASA , ISRO etc Different country maintained its own content , and thus data discrepancies There was no way data was shared .Licensing issues
  • Gis is not accesible to general public besides its very expensive to develop a full fledged gis appOpen source tools made this process cheaper and though they were not user frndly in the initial stages they were certainly cold be used in different approaches
  • All the gis app were built to solve a particular problem and were not appealing to the public massesTool centric and not user centricThe information was completely technology dependent and general masses had no contribution or connection to it.
  • Need to be aware of spatial dataProcessing contents from raw satellite imagesTheproblems in vector and raster formatsAs these major bottlenecks in here , created a major obstacle for GIS to proceed any further , not just because of technical reasons but also due to change in perspectives.
  • The 4 problems were bottleneck to GIS , thus impede the progress of this technology , not just cuz of techincal constraints , but also due to change in perspectives .Geography is study of the Earth and its lands, features, inhabitants, and phenomena . And in one way or another we all are a connected to geography , thus the technology connected to it must be appealing to normal users. Sadly in the geo community is pretty esoteric and may be a daunting task for him to comprehend and use technologies based on it .The separation between scientist and layperson, between expert and novice, is driven in many disciplines by the complexity of subject matter, by terminology that may be essential to precise communication within the discipline, but inaccessible to the outsider, by the high cost of entry into the observational process and the difficulties of empirical measurement, and by the complexity and abstraction of the discipline’s main concepts. All of these contribute to making many sciences impenetrable to the average citizen
  • Neogeographycombines the complex techniques of cartography and GIS and places them within reach of users and developers . Gis had to be made accesible to the ppl which was done later on and hence a new term was coined known as neogeographyWeb 2.0 is the only platform where GIS tech could appeal to all the masses , and users could actively involve in learning and using the technology at ease . With web 2.0 era all the tools began to focus on being user centric and put the complete social experience online .
  • Since the era of 2.0 was user centric focusing on putting social experience online where the information was shared among the people.
  • Web developers are acquiaunted with technologies like HTML , XHTML , javascript , .NET , Flash , CSS and so on . . . How would u acctually provide GIS to the WEB ?How would the data formats in this be ?
  • GPX <trkseg> A Track Segment holds a list of Track Points which are logically connected in order. To represent a single GPS track where GPS reception was lost, or the GPS receiver was turned off, start a new Track Segment for each continuous span of track data. <trkpt> trk represents a track - an ordered list of points describing a path.<ele> is elevation in meters<speed > instantaneous speed in that point .Keyhole Microformat
  • Microformat is a web-based approach to semantic markup which seeks to re-use existing HTML/XHTML tags to convey metadata[1] and other attributes in web pages and other contexts that support.JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate
  • Intro to open street mapsPpls contribution
  • Add figureNeogeography is a concept evolved from GIS where all open source tools were combined and shared by the people online.The GeoStack is a collection of tools and mechanisms that together cover all parts of collecting, gathering, and sharing location information. It enables using a GPS system to capture a waypoint and eventually have other users around the world view and comment on that waypoint.Exchangeable image file format (Exif) is a specification for the imagefile format used by digital cameras (including smartphones) and scannersGeoRSS is geo markup language RSS = Really simple syndication Web Feature Service Interface Standard (WFS) provides an interface allowing requests for geographical features across the web using platform-independent calls. Used by google , bing maps , yahoo maps etc
  • Comparison study betweengis and neoJustification to neoThe 3 main entities data , info , knowledge led to era of neogeography . HPV = high production volume Cadastre = Cadastral surveys document the boundaries of land ownership, by the production of documents, diagrams, sketches, plans (plats in USA), charts, and maps. They were originally used to ensure reliable facts for land valuation and taxationLIDAR = Laser Imaging and Distance RangingRs = Radiation sensing

Transcript

  • 1. NEOGEOGRAPHY MAPPING OUR PLACE IN THE WORLD MADE BY- NIKHITA BAHUGUNA RAHUL RAMAKRISHNA
  • 2. Brief history of cartography From where mapping began . . .
  • 3. HAND DRAWN MAPS BASED ON VARIOUS BELIEFS AND LIMITED INFORMATION
  • 4. GIS (Geographic Information System) • GIS also referred as Geospatial Information System, is the merging of cartography, statistical analysis, and database technology. • A GIS is a computer-based system to aid in the collection, maintenance, storage, analysis, output, and distribution of spatial data and information.
  • 5. What is Spatial Data? • Also known as geospatial data or geographic information it is the data or information that identifies the geographic location of features and boundaries on Earth, such as natural or constructed features, oceans, and more. • Spatial data is usually stored as coordinates and topology, and is data that can be mapped. Spatial data is often accessed, manipulated or analyzed through Geographic Information Systems.
  • 6. COMPONENTS OF GIS
  • 7. HARDWARE Hardware includes the computer on which a GIS operates, the monitor on which results are displayed, and a printer for making hard copies of the results.
  • 8. SOFTWARE GIS software provides the functions and tools needed to store, analyze, and display geographic information.
  • 9. DATA A GIS will integrate spatial data with other data resources and can even use a database management system, used by most organizations to organize and maintain their data, to manage spatial data.
  • 10. DATA REPRESENTATION VECTOR FORMAT
  • 11. RASTER FORMAT Image showing raster data in form of pixels.
  • 12. PEOPLE
  • 13. GIS users range from technical specialists who design and maintain the system to those who use it to help them perform their everyday work.
  • 14. METHODS Map of US showing the tourist population in the country Satellite image showing the topography of the land in an area A successful GIS operates according to a well-designed plan and business rules, which are the models and operating practices unique to each organization.
  • 15. GIS DATA MODELLING
  • 16. STEP 1: IDENTIFY THE SPATIAL FEATURES FROM THE REAL WORLD THAT ARE OF INTEREST
  • 17. STEP 2: REPRESENT THE CONCEPTUAL MODEL BY AN APPROPRIATE DATA MODEL, IT COULD BE VECTOR, RASTER OR BOTH
  • 18. STEP 3: SELECTING AN APPROPRIATE DATA STRUCTURE TO STORE THE MODEL WITHIN THE COMPUTER The data that has been processed by the system needs to be stored in an appropriate data structure that can allow easy management, retrieval and updation of this data. One such highly popular storage system is GEODATABASE.
  • 19. GIS Growth Model
  • 20. Proprietary Systems
  • 21. GIS : TOOL CENTRIC DEVELOPMENT
  • 22. Steep Learning Curve
  • 23. WHEN GIS MEETS WEB 2.0 • Neogeography literally means "new geography“ and is commonly applied to the usage of geographical techniques and tools used for personal and community activities or for utilization by a non- expert group of users
  • 24. How will web devs accomadate it ?
  • 25. DATA FORMATS • GPX, or GPS eXchange Format is an XML schema designed as a common GPS data format for software applications. • In GPX, a collection of points, with no sequential relationship is deemed a collection of individual waypoints. An ordered collection of points may be expressed as a track or a route. Conceptually, tracks are a record of where a person has been, routes are suggestions about where they might go in the future
  • 26. Data Formats cotd . . .
  • 27. LETS MAP . . .!!! • Head outside • Take a pen and paper • Take a GPS device • Get Signal • Walk to the destination • Mark waypoints
  • 28. GPS INTO GPX FORMAT • Use any software like easygps . • Import device to more useful GPX format . • Upload track to OSM • Make it public • Later can use for tracing
  • 29. POLATCH EDITING . . . !
  • 30. ONE LAST STEP . . .. ! ! ! • Add tags and conventions .. (make sure u use standard tags ) • Mistakes do happen • Stay in touch with the community .. After all its all about crowd sourcing .
  • 31. User involvement
  • 32. GeoStack : Agglomerating all the tools
  • 33. QUESTIONS ?