[mapserver-users] MapServer 4.8.3: MapScript setProjection

Rahkonen Jukka Jukka.Rahkonen at mmmtike.fi
Wed Mar 12 06:54:53 PDT 2008


 >  > Excuse the stupid question, but what do you mean by native PROJ4
definition?  Do you mean applying the inline parameters directly?  
   
> He means  giving the projections with the actual strings which are
also hidings behind the epsg codes, 
> for example this means the same as epsg:2393PROJECTION "+proj=tmerc
+lat_0=0 +lon_0=27 +k=1.000000 
> +x_0=3500000 +y_0=0 +ellps=intl
+towgs84=-90.7,-106.1,-119.2,4.09,0.218,-1.05,1.37 +units=m +no_defs" 
> Projection strings are slower to write int  mapfile but for Mapserver
they are faster to execute because these is  
> no need to jump to projection library file. If you have MS4W
installation you can find the strings to use from  
> D:\ms4w\proj\nad directory, most of them from file names epsg.
 
Excuse the stupid answer, you were asking about MapScript which I know
nothing about.  Basically it must be
about the same thing, though.
 
-Jukka-



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