[Proj] proj and Dutch RD

[Martin Vermeer]

On Wed, Jan 11, 2006 at 10:09:39AM -0800, Eric Miller wrote:
> Here's a source listing 3-parameter values for transforming between WGS84 and RD: http://kartoweb.itc.nl/geometrics/Reference%20surfaces/DATUM.txt
> 
> """
> Rijks Driehoeksmeting=Bessel 1841,-593,-26,-478,Netherlands
> """
> 
> I've no idea if the signs needs to be changed or what the source is...  Caveat lector!
> 
> Theoretically you can use the +towgs84 argument to apply the datum transformation.

Yes of course... you need the correct translation vector. The Bessel
ellipsoid is non-geocentric!

Forget my suggestion of using bessel as the 'from' ellipsoid. It should
be wgs84 with proper shift added.

- Martin

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://lists.maptools.org/pipermail/proj/attachments/20060111/877a324a/attachment.bin