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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
Projected coordinate systems

About projected coordinate systems

About map projections

Projection types

Planar projections

Conic projections

Cylindrical projections

Other projections

Projection parameters
Geographic transformations
Supported map projections
Vertical coordinate systems
Mapping and visualization
Editing and data compilation
Geoprocessing
Geoprocessing tool reference
Geodatabases and ArcSDE
Data management with ArcCatalog
Data support in ArcGIS
Extensions
3D Analyst
ArcGIS Data Interoperability extension
ArcGIS Publisher
ArcScan
Business Analyst
Geostatistical Analyst
Maplex
Military Analyst
Getting started with Military Analyst
What's new in Military Analyst 9.2
Data Management
Coordinate tool
Terrain Analysis tools
Geodesy tools
The conversion tools
MA catalog wireframe symbology
Military Analyst in ArcGlobe
Military Analyst tools reference
Military Overlay Editor

About MOLE

What's new in this release

Installation and setup

Accessing the MOLE getting started guide

MOLE documentation and additional ways to get help

MOLE considerations for ArcView users
Using MOLE with 2D maps
Using MOLE with 3D maps
The MOLE geodatabase schema
Using MOLE in terrain analysis
Tracking, real-time, and MOLE
Using MOLE with ArcSDE
Using MOLE with ArcIMS
Advanced topics
Frequently asked questions
Network Analyst
PLTS
Schematics
Spatial Analyst
Survey Analyst
Tracking Analyst
Geocoding and address management
Linear referencing
Network analysis
Mobile GIS
Interoperability and standards support

Overview of interoperability

Overview of OGC and ISO support

ESRI protocols and programming interfaces
GML support in ArcGIS
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