Lecture 1b introduction to arc gis

What is GIS?
• Many definitions available
• System for display, storage, mapping, analysis of spatial data
• Many acronyms for GIS
• Geographic Information Systems
• Geographic Information Science
– Body of Knowledge
• Geographic Information Services, etc.
2
Sarfaraz Alam, sarfaraz_wre@yahoo.com

History of ArcGIS
3
1969
Jack Dangermond
founds ESRI
1982
Arc/INFO (Unix)
1989 PC Arc/INFO (DOS + Windows)
1992
ArcView + Arc/INFO
2002
ArcView 3.3
“retired product”
1999 ArcGIS v.8.0
(to v8.3)
2004
ArcGIS v.9.0
2008
ArcGIS v.9.3Sarfaraz Alam, sarfaraz_wre@yahoo.com

Overview of ArcGIS Desktop
• ArcGIS Desktop has three levels of licensing:
• ArcView
– Mapping + geoprocessing + data
management
• ArcEditor
– ArcView + additional editing +
additional geoprocessing
• ArcInfo
– ArcEditor + advanced geoprocessing
+ extensive database management +
high-end cartography
4

ArcGIS Desktop Components
• ArcCatalog
• ArcMap
• ArcToolbox
• Extensions
• 3D Analyst, Spatial Analyst, Network Analyst, Geostatistical Analyst,
Crime Analyst, ArcGIS Schematics, Business Analyst, PLTS, Data
Interoperability, Tracking Analyst, ArcGIS Publisher, Survey Analyst,
ArcScan (included with ArcEditor license), Maplex (included with
Arcinfo license)
http://www.esri.com/software/arcgis/about/desktop_extensions.html
http://support.esri.com/index.cfm?fa=software.extentions
5

Data Models - 1
• How we represent real world
spatial phenomena
• Two main models:
• Vector
– Points (single x,y coordinate)
– Lines (strings of x,y coordinates)
– Polygons (closed string of x,y
coordinates)
• Raster
– A grid of (often) square-shaped
cells
– Individual cells together are used to
create a layer of points, lines and
areas
6

Data Models - 2
– Other models:
• Surfaces for 3D visualisation
• Networks (geometric, transportation)
7

ESRI Data Formats
• Coverages (vector) and GRIDs (raster)
– Consists of two folders:
• name of coverage or grid
• INFO directory
• Shapefiles
• Geodatabases
8
Examples of coverages in Windows File Explorer

Shapefiles
<filename>.shp stores the spatial or feature information
<filename>.dbf dBASE file contains attribute information about the
spatial features
<filename>.shx stores the index of the features
<filename>.sbn stores the spatial index of features
<filename>.sbx also stores information pertaining to the spatial index
of features
<filename>.prj contains projection information

Geodatabases
• Core ArcGIS data model
• A comprehensive model for
representing and managing geographic
data
• Personal Geodatabase
• Single user editing / multiple readers
• Stored in MS Access
• Size limit of 2 GB
• File Geodatabase
• Single user editing / multiple readers
• 1 TB per table
• Reduced storage requirements
• ArcSDE Geodatabase
• Stored in an Enterprise DBMS
• Supports multiuser editing via
versioning
• Requires ArcEditor or ArcInfo to edit
ArcGIS
Personal
Geodatabase
File
Geodatabase
ArcSDE
Geodatabase
Oracle
SQL Server
DB2
Informix
PostgreSQL
ArcSDE

An Introduction to ArcCatalog
Hands-on Exercise #1
11

ArcCatalog

The ArcCatalog Interface
13
5 Dockable toolbars
7 Geography Preview Mode
1 Title bar 4 Standard toolbar
6 Catalog
Tree
(navigation)
3 Metadata
toolbar
2 Location
toolbar

Catalog Tree
14
• Icons identify data types
• Right-click of a context menus
• Supports drag, drop, copy,
paste
• Displays folder connections
• Displays other connections
• ArcSDE databases
• Web servers (internal,
ESRI) Context
menu

Preview - Geography
15

Preview - Table View
16

Metadata View
17

Management tasks
• Copy, paste, delete, rename data
• Move to other locations
• Create new objects
• Connect to folders
18

Searching for Data
• Edit  Search
• can search for geography or metadata
• can search using different parameters
• Name + physical location
• Geography
• Date
19

ArcCatalog Options
• Tools  Options
• Manage ArcCatalog’s content
and behaviour
• Add new file types (e.g. ppt)
• Set font characteristics for
tables
• Set geoprocessing
environment
• Set metadata defaults
20

Metadata
• Descriptive information about data
• Content
• Quality
• Condition
• Origin
• Other characteristics
– But do you really need it?
• All GIS resources need metadata
– Spatial data
– Non-spatial data
21

Metadata in ArcCatalog
•One-stop shop for all your metadata needs
•Oan create metadata for anything visible in the catalog
• ArcCatalog has the tools for working with it
• ToolsOptions Metadata tab
• Metadata toolbar for working with metadata
22

Create and update metadata
• Automatically
• Created first time an item’s metadata is viewed
• Updated whenever metadata is viewed in metadata tab
• Edit metadata button
• Manually
• Tools  Options  Metadata tab
• Create / Update metadata button
• Choose your stylesheet here
23

In Summary
ArcCatalog allows you to:
•Browse, manage and find spatial data
•Record, view and manage metadata
•Search for GIS data on local drives, networks and the
Web
•Define, import and export geodatabases and other
datasets
•Create and manage the schemas of geodatabases
•Administer ArcSDE geodatabases
•Administer an ArcGIS server
24

An Introduction to ArcMap
Hands-on Exercise #2
25

The ArcMap Interface
26
4 Standard
Toolbar
1 Table of
Contents
6 Drawing
Toolbar
2 Map Display
5 Tools
Toolbar
3 Main Menu Toolbar

Adding Layers
• Use the Add Data button
• Search for data in ArcCatalog and slide the data into ArcMap
27

Right-click: Context Menu
28

Tools Toolbar
29
Zoom outZoom in
Pan Go to full extent
Zoom out to a fixed extentZoom in to a fixed extent
Go to previous extent Go to next extent
Measure
Clear selected features
Select elements Identify
Find
Select features
Go to X-Y coordinate
Hyperlink

Lecture 1b introduction to arc gis

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Viewers also liked

Viewers also liked (20)

Similar to Lecture 1b introduction to arc gis

Similar to Lecture 1b introduction to arc gis (20)

Recently uploaded

Recently uploaded (20)

Lecture 1b introduction to arc gis

Editor's Notes