[Proj] Proj4 transform from WGS84 to UK Northings and Eastings help needed ...

Philipp H. Mohr phm4 at kent.ac.uk
Tue May 23 09:48:13 EDT 2006


On Tue, 23 May 2006, Penny Bamborough wrote:

> Would anyone have any suggestions as to why we receive this position
> offset error ?

I use the following and it works fine for me:

cs2cs -r +proj=latlong +ellps=WGS84 +towgs84=0,0,0 +nodefs +to +proj=tmerc
+lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy
+towgs84=446.448,-125.157,542.060,0.1502,0.2470,0.8421,-20.4894 +units=m
+no_defs < gps.out > gps.in

hth Phil

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