[Mapserver-users] mask

[Daniel Morissette]

John Hagstrand wrote:
> 
> Does MapServer have the concept of masking?  I want to mask one layer with
> another.
> 
> Specifically, I have world map vector data, with land mass polygons in one
> layer, and political boundaries in another layer.  The political polygons
> need to be masked by the land mass polygons so they don't extend out into
> the oceans.  I hope I've been clear.
> 

I'm not sure to understand why you need to mask the political polygons
in this case, but I don't need to understand anyway. 

MapServer doesn't support mask layers directly, but we've done this a
few times in PHP MapScript, see the following post from the archives:

http://mapserver.gis.umn.edu/data2/wilma/mapserver-users/0301/msg00395.html

Daniel
-- 
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 Daniel Morissette               morissette@dmsolutions.ca
 DM Solutions Group              http://www.dmsolutions.ca/
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