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Welcome to ArcGIS Desktop Help
Copyright information
Acknowledgements
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)?

GCS_Assumed_Geographic_1
Projected coordinate systems
Geographic transformations
Supported map projections
Vertical coordinate systems
Mapping and visualization
Editing and data compilation
Tables and attribute information
Geoprocessing
Geoprocessing tool reference
Geodatabases and ArcSDE
Data management with ArcCatalog
Image and raster data management
Data support in ArcGIS
Extensions
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
WFS support in ArcGIS
WCS support in ArcGIS
WMS support in ArcGIS
KML support in ArcGIS

An overview of KML support in ArcGIS

KML elements

Why share GIS data as KML?

Translating ArcGIS information to KML

Preparing your map documents in ArcGIS for KML publishing

Creating KML files

Serving KML with ArcGIS Server

KML examples

Using folders to organize KML content

Frequently asked questions about KML
Customizing and developing with ArcGIS
Guide to data that comes with ArcGIS
Licensing and desktop administration
GIS Servers and services