Show Navigation | Hide Navigation
You are here:
Map projections and coordinate systems > Supported map projections

Chamberlin Trimetric

Release 9.2
Last modified August 3, 2007
E-mail This Topic Printable Version Give Us Feedback

Print all topics in : "Supported map projections"


Related Topics



Description

This is the standard projection developed and used by the National Geographic Society for continental mapping. The distance from three input points to any other point is approximately correct.

Illustration of Chamberlin Trimetric projection


Projection method

Modified planar.


Linear graticules

None.


Properties


Shape



Shape distortion is low throughout if the three points are placed near the map limits.

Area



Areal distortion is low throughout if the three points are placed near the map limits.

Direction



Low distortion throughout.

Distance



Nearly correct representation of distance from three widely spaced points to any other point.


Limitations

The three selected input points should be widely spaced near the edge of the map limits.

Chamberlin Trimetric can only be used in ArcInfo as an OUTPUT projection because the inverse equations (Chamberlin Trimetric to geographic) have not been published.

You can't project an ArcInfo grid or lattice to Chamberlin Trimetric because the inverse equations are required.


Uses and applications

Used by the National Geographic Society as the standard map projection for most continents.


Parameters


Workstation





Please visit the Feedback page to comment or give suggestions on ArcGIS Desktop Help.
Copyright © Environmental Systems Research Institute, Inc.