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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

Geographic transformation methods

Equation-based methods

Grid-based methods
Supported map projections
Vertical coordinate systems
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

Editing ArcSDE geodatabases

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

Editing features that have z-values

Shortcut keys for editing in ArcMap

Frequently asked questions about editing
Common editing tasks

Common point editing tasks

Common line editing tasks

Common polygon editing tasks

Common annotation editing tasks

Common multipoint editing tasks

Editing data in a different projection
Creating new features
Editing existing features
Editing attributes

Editing attributes

Copying and pasting attributes

Deleting attributes

Editing with default values and attribute domains

About updating data using SQL
Editing annotation
Editing dimension features
Using a digitizer

About digitizing

An overview of preparing to digitize

Registering the paper map

Digitizing features on a paper map
Spatial adjustment
Editing topology
Editing relationships and related objects
COGO

An overview of COGO

Common COGO workflows

About COGO descriptions

Adding COGO fields to a feature class

Traverse file format

Offset points file format

Applying a ground to grid correction

Reporting COGO descriptions

Using the Curve Calculator command

Using the COGO Area command

Splitting features into COGO lines
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
Getting started with linear referencing
Creating route feature classes
Displaying and querying route feature classes
Displaying and querying route events
Editing routes
Creating and editing event data

An overview of creating and editing event data

Creating event tables in ArcCatalog

About locating features along routes

Locating features along routes

Editing event tables in ArcMap
Working with route event data

An overview of working with route event data

About overlaying event data

Overlaying events

About aggregating event data

Aggregating route events

About transforming event measures

Transforming event measures

Accessing the Route Events Geoprocessing wizard
Network analysis

Using the Network Analyst extension
Analyzing geometric networks
Mobile GIS
Interoperability and standards support
Customizing and developing with ArcGIS
Guide to data that comes with ArcGIS
Licensing and desktop administration
GIS Servers and services