Using Map Projections with MapServer
The projection settings in a MapServer map file are at two levels: the output map projection and the projection of the input layers of features to be drawn. Example A-1 shows a sample of the projection settings for an output map.
PROJECTION "proj=aea" "ellps=WGS84" "lat_0=10" "lon_0=-90" END
The settings may look confusing to anyone unfamiliar with projections, but they have a straightforward purpose. If you can get these four settings clear in your mind, you’ll be able to handle most projections with ease.
The first line in Example A-1, "proj=aea"
, is the most ...
Get Web Mapping Illustrated now with the O’Reilly learning platform.
O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.