[OSM-talk-be] URBis, Open!

[Wim Crols]

On Sat, Apr 27, 2013 at 12:02 AM, A.Pirard.Papou
<A.Pirard.Papou at gmail.com>wrote:

> **
> On 2013-04-26 11:20,  Chris Browet wrote :
>
>  The Lambert72 PROJ4 string extracted from the prj is:
>
>  +proj=lcc +lat_1=49.8333339 +lat_2=51.16666723333333 +lat_0=90
> +lon_0=4.367486666666666 +x_0=150000.01256 +y_0=5400088.4378 +ellps=intl
> +units=m +no_defs
>
>  And doesn't quite work.
>
>  This one is ok:
>
> +proj=lcc +lat_1=51.16666723333334 +lat_2=49.83333389999999 +lat_0=90
> +lon_0=4.367486666666666 +x_0=150000.013 +y_0=5400088.438 +ellps=intl
> +towgs84=-99.1,53.3,-112.5,0.419,-0.83,1.885,-1.0 +units=m +no_defs
>
> There are 4 or 5 proj4 definitions of Lambert 72 around and bugs reports.
> This is the correct one, I think, that I configured Merkaartor with after
> much searching.
>
>
Actually this is the one defined in proj4 now

+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

https://svn.osgeo.org/metacrs/sr.org/epsg/proj/epsg

look for 31370


> Obviously, IGN/NGI should specify their projections' proj4 definitions on
> their site.
> Someone should notify them.
>
> Cheers
>
>   André.
>
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>
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