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Welcome to ArcGIS Desktop Help
Copyright information
GIS Dictionary
What's new in ArcGIS

What's new in ArcGIS 9.2
Migration guides
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

An overview of editing and data compilation
Getting started with editing

About editing your geodatabase in ArcMap

Adding the data you want to edit

The structure of vector datasets

Adding the editing toolbars

Starting and stopping an edit session

The sketch construction tools

Using the snapping environment

About setting distance units

Setting direction measuring systems and units

Shortcut keys for editing in ArcMap
Common editing tasks
Creating new features
Editing existing features
Editing attributes
Editing annotation
Editing dimension features

About editing dimension features

Creating dimension features

Modifying a dimension feature's geometry and style
Using a digitizer
Spatial adjustment
Editing topology

About topology

Topology rules

Topology error fixes

Basic topology tasks

Creating a map topology

Editing features in a topology

Editing shared geometry

Topology validation

Topology errors and exceptions

Correcting topology errors

Finding features with shared topology elements

Clearing selected topology elements

Changing the symbology for topology features

Making new features with topology tools
Editing relationships and related objects
COGO
Geoprocessing
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
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

Using the Network Analyst extension
Analyzing geometric networks
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
Working with StreetMap data
Licensing and desktop administration
ArcGIS Image Server
GIS Servers and services