[postgis-users] Coordinates transform results geotools vs postgis

[Smith Roman]

Hi everyone,I intend transforming coordinates in wgs 84 to utm (epsg 26331).Using geotools (a java gis library) and postgis I tested the following sample coordinates 

(3.3315343, 6.5593127) - lon/lat (epsg 4326)

The results are as follows:

536652.452363815 724978.600712583 - postgis

536734.381740803, 724933.4461779824 - geotools536652.5, 724978.9 - landserf java apiI was told that the postgis conversion did not use towgs84 parameters in the coordinate transformation thats why its values are different from the geotools version. Another 3rd part java gis library gave me similar results to the postgis version.My question is this, is the transformation result in postgis correct ?My application will require making server side coordinate transformations as well as on the client. I would like to get consistent results from the two.Thanks,Roman




      
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