nutiteq 31370 projection

[Alexander Van Hecke AWV DEV]

Hi,
we're using the nutiteq v 2.4.2 31370 projection (lambert 72). We
noticed a consistent offset in map coordinates when transforming GPS
coordinates to map coordinates (using the fromWgs84 method).

We have traced this problem to the arguments passed to the
Proj4jProjection super class of EPSG31370. The params in EPSG31370
are :

+proj=lcc +lat_1=51.16666723333333 +lat_2=49.8333339 +lat_0=90
+lon_0=4.367486666666666 +x_0=150000.013 +y_0=5400088.438 +ellps=intl
+towgs84=106.869,-52.2978,103.724,-0.33657,0.456955,-1.84218,1
+units=m +no_defs

we have changed this to :

+proj=lcc +lat_1=51.16666723333333 +lat_2=49.8333339 +lat_0=90
+lon_0=4.367486666666666 +x_0=150000.013 +y_0=5400088.438 +ellps=intl
+towgs84=-106.8686,52.2978,-103.7239,0.3366,-0.457,1.8422,-1.2747
+units=m +no_defs

(notice the changed towgs84 params, taken from postgis).

With these modified params, the offset is gone.

wkr,