[mapserver-users] changing projection

[boice tomlin]

Hello,

We are using mapserver version 4.10 and in our mapfile we don't  
specify a projection at the map level or in any of the layers.

Now we need to change the projection to;

North_America_Albers_Equal_Area_Conic projection

I have added the following projection information to the map file but  
it does not effect our map at all.

PROJECTION
     "+proj=aea +lat_1=20 +lat_2=60 +lat_0=40 +lon_0=-96 +x_0=0 +y_0=0  
+ellps=GRS80 +datum=NAD83 +units=m +no_defs"
END

I'm assuming there are some other things we need to do besides  
specifying the projection in the mapfile.  Can anyone provide me the  
appropriate steps?

We are using PHP Mapscript and shape file from the US census.

Should we expect to be able to change projections on the fly by  
specifying the projection we want to use in the mapfile?

thank you for the information.

-boice




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