[FWTools] crs definition with both +nadgrids and +towgs84 parameters

[Frank Warmerdam]

SAEZ Laurent - CETE Méditerr./DI/ETER wrote:
> Hi list,
> 
> Someone could tell me what appens if +nadgrids and +towgs84 are both  
> used in a crs
> definition (e.g. in the EPSG file) ?
> Which parameter is taken into account ?
> Is the behavior the same in all tools (cs2cs, ogr utilities, gdal  
> utilities, mapserver,PostGIS...) ?

Laurent,

I do not know which takes precidence ... the only answer I would trust would
be one based on experimentation, so you might as well experiment.

GDAL/OGR's parsing of PROJ.4 strings is likely to be different than their
direct use in PROJ.4 itself.

Best regards,

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