[MS4W-Users] Coordinate Projects

Frank Warmerdam warmerdam at pobox.com
Wed Nov 11 12:20:35 EST 2009

Gayani Edirisinghe wrote:
> Dear all,
>   I am using maps of sri Lanka UTM 44 Kadawala Projection values are below.
> Semimajor Axis: 6377276.344999999700000000
>     Semiminor Axis: 6356075.413140240100000000
>     Inverse Flattening: 300.801699999999980000
> False_Easting: 200000.000000
> False_Northing: 200000.000000
> Central_Meridian: 80.771713
> Scale_Factor: 0.999924
> Latitude_Of_Origin: 7.000472
> Linear Unit: Meter (1.000000)
> Please tell me how I could change the map server to display correct coordinate


Presuming that the projection method is Transverse Mercator you could use
a PROJECTION block like:

   "+proj=tmerc +lon_0=80.771713 +k=0.999924 +lat_0=7.000472 +x_0=200000 
+y_0=20000 +units=m +a=6377276.3449999997 +b=6356075.4131402401"

I am not familiar with your coordinate system but a simplistic attempt to look
it up in the EPSG coordinate system failed.  So it might be hard to deploy
a WMS based on it since that depends on knowing an EPSG code.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent

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