[Proj] Need a working PROJ4 string for the dutch grid

Roger Oberholtzer roger at opq.se
Fri Mar 10 04:15:34 EST 2006

On Thu, 2006-03-09 at 22:45 -0800, Paul Meems wrote:
> I've got some trouble finding a working PROJ4 string for the dutch grid.
> I'm on the developing team of MapWindow ( www.mapwindow.org ) and we use
> PROJ4 for our (re)projection. The most projections work fine but the one I'm
> interesting in the Dutch Grid projection (I live in The Netherlands) isn't
> working correctly.
> Does anybody knows the working PROJ4 string?

When converting from WGS84 lat/longs, (like from a GPS) I use:

+proj=latlong +ellps=WGS84 +to +proj=sterea +lat_0=52.15616055555555
+lon_0=5.38763888888889 +k=0.9999079 +x_0=155000 +y_0=463000
+ellps=bessel +units=m +no_defs

I hope I copied that correctly. I do this from the C API, but these
should be the same.

I did have some data that required the +ellps=WGS84 be changed to
+ellps=bessel, which I think was because of something undocumented that
was done to the source data.

> For more info, please look at:  bugs.mapwindow.org 
> Thanks
> Paul
> --
> View this message in context: http://www.nabble.com/Need-a-working-PROJ4-string-for-the-dutch-grid-t1257346.html#a3334245
> Sent from the PROJ.4 forum at Nabble.com.
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Roger Oberholtzer

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