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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
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
Geocoding and address management
Linear referencing
Network analysis
Mobile GIS
Interoperability and standards support
Customizing and developing with ArcGIS
Guide to data that comes with ArcGIS
Licensing and desktop administration
ArcGIS Image Server
GIS Servers and services