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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

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
Editing and data compilation

An overview of editing and data compilation
Getting started with editing
Common editing tasks
Creating new features
Editing existing features

Moving features

Rotating features

Copying and pasting features

Deleting features

Adding and deleting vertices

Moving vertices

Editing attribute values of a vertex

Reshaping lines and polygons using a sketch

Splitting polygon features

Splitting line features

Trimming lines

Extending lines

Flipping lines

Scaling features

Clipping features

Stretching a feature's geometry proportionately

Simplifying and smoothing 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

An overview of spatial adjustment

Adding the Spatial Adjustment toolbar

Setting up the spatial adjustment

Working with links

Working with link files and control point files

Previewing and performing the adjustment

Transferring attributes between features
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

An overview of data support in ArcGIS

Data formats supported in ArcGIS
CAD data
Coverages
NetCDF: multidimensional, time series data
Shapefiles
Terrains
Extensions
Geocoding and address management
Linear referencing
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