[mapserver-users] Re: changing projection of a "polygon"

[Sumit Sharma]

if you want to do it on the fly you need to define projection parameter on
layer as well as on map objects in map file. You can treat projection
parameters on layer as your input parameters and on map as your output
parameters...
however if you want to convert your data from one projection to another,
safe approach would be to use OGR2OGR  utility. and still if you would like
to do it using mapscript (I would not recommend that) you can take reference
of source code of ogr2ogr.cpp.
 
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