[Proj] Belge 1972 / Belgian Lambert 72 (31370) -towgs84parameters

Roger Oberholtzer roger at opq.se
Thu Jan 28 08:21:15 EST 2010

On Thu, 2010-01-28 at 10:51 +0100, Jan Hartmann wrote:
> Hi Thibaut,
> Why did they do this in 2005? In Holland we still use the RD system
> with the Bessel ellipse. 

OOC, how do you configure proj for RD? I am using this (WGS84 Lat/Long
is the source) in the C-API:

 "+proj=sterea "
 "+lat_0=52.15616055555555 "
 "+lon_0=5.38763888888889 "
 "+k=0.9999079 "
 "+x_0=155000 "
 "+y_0=463000 "
 "+ellps=bessel "
 "+units=m "

I just want to verify that nothing has gone wrong in my library. Bit rot
and all that.

Is there a good (official?) set of test data for RD? Something that has
WGS84 lat/longs, and the corresponding RD northings/eastings.  I can
never have too many tests!

Roger Oberholtzer

OPQ Systems / Ramböll RST

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