Geographic Coordinate Reference Systems
Transform data to and from Geographic Coordinate Systems (GCS) and
projected coordinate systems
Functions
mfwdtran | Project geographic features to map coordinates |
minvtran | Unproject features from map to geographic coordinates |
projfwd | Forward map projection using PROJ.4 map
projection library |
projinv | Inverse map projection using PROJ.4 map
projection library |
antipode | Point on opposite side of globe |
newpole | Origin vector to place specific point at pole |
org2pol | Location of north pole in rotated map |
putpole | Origin vector to place north pole at specified point |
rotatem | Transform vector map data to new origin and orientation |
Topics
Latitude and Longitude
Latitude and longitude specify the position of a point on the surface of a planet.
They are defined as angles between the point, the equator, and the axis of
rotation.
Rotational Transformations on the Globe
You can redefine a coordinate system and transform all points to the new coordinate
system. The transformation can be useful independent of map displays.