Chamberlin Trimetric¶
Classification |
Miscellaneous |
Available forms |
Forward spherical projection |
Defined area |
Global |
Alias |
chamb |
Domain |
2D |
Input type |
Geodetic coordinates |
Output type |
Projected coordinates |

proj-string: +proj=chamb +lat_1=10 +lon_1=30 +lon_2=40
¶
Parameters¶
Required¶
Note
Control points should be oriented clockwise.
-
+lat_1
=<value>
¶ Latitude of the first control point.
-
+lon_1
=<value>
¶ Longitude of the first control point.
-
+lat_2
=<value>
¶ Latitude of the second control point.
-
+lon_2
=<value>
¶ Longitude of the second control point.
-
+lat_3
=<value>
¶ Latitude of the third control point.
-
+lon_3
=<value>
¶ Longitude of the third control point.
Optional¶
-
+lon_0
=<value>
¶ Longitude of projection center.
Defaults to 0.0.
-
+R
=<value>
¶ Radius of the sphere given in meters. If used in conjunction with
+ellps
,+R
takes precedence.
-
+x_0
=<value>
¶ False easting.
Defaults to 0.0.
-
+y_0
=<value>
¶ False northing.
Defaults to 0.0.