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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

About projected coordinate systems

About map projections

Projection types

Planar projections

Conic projections

Cylindrical projections

Other projections

Projection parameters
Geographic transformations
Supported map projections

List of supported map projections

Aitoff

Alaska Grid

Alaska Series E

Albers Equal Area Conic

Azimuthal Equidistant

Behrmann Equal Area Cylindrical

Bipolar Oblique Conformal Conic

Bonne

Cassini-Soldner

Chamberlin Trimetric

Craster Parabolic

Cube

Cylindrical Equal Area

Double Stereographic

Eckert I

Eckert II

Eckert III

Eckert IV

Eckert V

Eckert VI

Equidistant Conic

Equidistant Cylindrical

Equirectangular

Fuller

Gall's Stereographic

Gauss-Krüger

Geocentric Coordinate System

Geographic Coordinate System

Gnomonic

Goodes Homolosine

Great Britain National Grid

Hammer-Aitoff

Hotine Oblique Mercator

Krovak

Lambert Azimuthal Equal Area

Lambert Conformal Conic

Local Cartesian Projection

Loximuthal

McBryde-Thomas Flat-Polar Quartic

Mercator

Miller Cylindrical

Mollweide

New Zealand National Grid

Orthographic

Perspective

Plate Carrée

Polar Stereographic

Polyconic

Quartic Authalic

Rectified Skewed Orthomorphic

Robinson

Simple Conic

Sinusoidal

Space Oblique Mercator

State Plane Coordinate System

Stereographic

Times projection

Transverse Mercator

Two-Point Equidistant

Universal Polar Stereographic

Universal Transverse Mercator

Van der Grinten I

Vertical Near-Side Perspective

Winkel I

Winkel II

Winkel Tripel
Vertical coordinate systems

About vertical coordinate systems

Vertical datums

Geoid
Mapping and visualization
An overview of mapping and visualization
Using ArcMap
Working with layers

Adding layers to a map

Adding a layer package to your map

Adding x,y coordinate data as a layer

Changing a layer's drawing order

Changing a layer's text description

Setting layer properties

Managing group layers

Saving a layer to disk

Copying layers

Displaying layers at certain scales

Displaying a subset of features in a layer

Repairing broken data links

Viewing a layer's metadata in ArcMap

Setting HTML pop-up properties for feature layers
Navigating and interacting with maps
Adding graphics and text to maps
Working with graphics
Working with text
Symbolizing data
Applying symbology
Styles and symbols
Animation
Using cartographic representations
Page layout and map composition
Getting started with laying out and printing maps
Map elements
Grids and graticules
Rulers and guides
Working with data frames in layout view
Creating interactive and paperless maps
Map output
Map series
Designing maps for optimal performance
Working with graphs and reports
Working with web maps in ArcGIS
Publishing optimized map services in ArcGIS

Publishing optimized map services

Drawing differences between ArcMap and optimized map services
Map Service Publication Toolbar error messages
Map Service Publication Toolbar warning messages
Map Service Publishing Toolbar information messages
Editing and data compilation

An overview of editing and data compilation
Getting started with editing
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
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

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
WFS support in ArcGIS
WCS support in ArcGIS
WMS support in ArcGIS
KML support in ArcGIS
Customizing and developing with ArcGIS
Guide to data that comes with ArcGIS
Licensing and desktop administration
GIS Servers and services

An overview of GIS servers used with ArcGIS
Using ArcIMS with ArcGIS Desktop
Using ArcGIS Server with ArcGIS Desktop
Authoring and publishing services for ArcGIS Server
Administering ArcGIS Server with ArcCatalog
Creating and publishing web maps for ArcGIS Server