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Welcome to ArcGIS Desktop Help
Copyright information
GIS Dictionary
What's new in ArcGIS
Getting started
Map projections and coordinate systems
Getting started with map projections

An overview of map projections

Projection basics the GIS professional needs to know

About the geoid, ellipsoid, spheroid and datum, and how they are related

Identifying an unknown coordinate system

Converting Degrees Minutes Seconds values to Decimal Degree values
Geographic coordinate systems

About geographic coordinate systems

Spheroids and spheres

Datums

North American datums

What happens to features at +/-180 (dateline)?
Projected coordinate systems

About projected coordinate systems

About map projections

Projection types

Planar projections

Conic projections

Cylindrical projections

Other projections

Projection parameters
Geographic transformations

Geographic transformation methods

Equation-based methods

Grid-based methods
Supported map projections
Vertical coordinate systems

About vertical coordinate systems

Vertical datums

Geoid
Mapping and visualization
Editing and data compilation
Geoprocessing

What is geoprocessing?

A whirlwind tour of geoprocessing

Geoprocessing tools

Geoprocessing framework

Frequently Asked Questions about geoprocessing
Fundamental tool concepts
Using geoprocessing tools
Automating your work with models
Automating your work with scripts
Geoprocessing environments

An overview of geoprocessing environments

Environment levels and hierarchy

Script environments

Specifying application environment settings

Specifying tool environment settings

Specifying model environment settings

Specifying model process environment settings
Environment categories
Documenting tools and toolboxes
Sharing tools and toolboxes
Keeping track of geoprocessing history

An overview of geoprocessing history

History logging and the History toolbox

Managing history

Geoprocessing history in metadata
Advanced modeling through simulations

An overview of advance modeling through simulations

General concepts of modeling through simulations
Developing the different modeling approaches
Geoprocessing tool reference
Geodatabases and ArcSDE
Data management with ArcCatalog
Data support in ArcGIS
Extensions
Geocoding and address management
Linear referencing
Getting started with linear referencing

An overview of linear referencing

Common tasks in linear referencing

Some linear referencing scenarios

Linear referencing datasets in ArcGIS

Designing a linear referencing system in your geodatabase
Creating route feature classes
Displaying and querying routes feature classes
Displaying and querying route events
Editing routes
Creating and editing event data
Working with route event data
Network analysis
Mobile GIS
GPS
Tablet PC
ArcPad integration
Interoperability and standards support
Customizing and developing with ArcGIS
Guide to data that comes with ArcGIS
ESRI Data and Maps
Getting started with ESRI Data and Maps
United States (census)
United States (hydrography)
United States (landmarks)
United States (transportation)
United States (other)
StreetMap USA
World
Europe
Canada
Mexico
Elevation and image data
Working with StreetMap data
Licensing and desktop administration
ArcGIS Image Server
GIS Servers and services