[MAPSERVER-USERS] PostGIS data in EPSG:31300 using for Google Maps overlay

[Steven De Vriendt]

thanks Carla, although I'm not sure about that last bit. So I have
searched for the epsg parameters of 31300 (Belge Lambert 72), and now
I have to add some parameters ? I'm not sure which parameters I have
to add/adjust..

<31300> +proj=lcc +lat_1=49.83333333333334 +lat_2=51.16666666666666
+lat_0=90 +lon_0=4.356939722222222 +x_0=150000.01256 +y_0=5400088.4378
+ellps=intl +units=m +no_defs  no_defs <>

Thanks
Steven

On Wed, Apr 9, 2008 at 9:04 AM, cfb <carla.fernandezb at gmail.com> wrote:
>
>  Hi Steven,
>
>  I had the same problems, my data were in EPSG:23030 but when I wanted to
>  overlay my WMS in Google Earth, even If I'd included EPSG:4326 in the
>  wms_srs list, It showed a difference between my map and Google. So, first of
>  all, you must include the 4326 in your wms_srs list (in the header and in
>  the layers), then you must set EPSG:4326 as your projection object in the
>  header, leaving the layers projections as 31300, and then you must look at
>  the epsg file in the PROJ library (\\ms4w\proj\nad), because probably your
>  EPSG code (31300) asn't all the parameters needed to reproject correctly the
>  data...
>
>  Look something like +towgs84, and try to find some parameter that help
>  MapServer to reproject better the data...like this you won't have to
>  reproject your original data
>
>  Regards
>
>
>
>
>
>
>
>
>
>  gisaalter wrote:
>  >
>  > Hi list,
>  >
>  > I have some data in PostGIS I wish to overlay in Google Maps using WMS
>  > I'm using the same data in a mapserver application, where EPSG code
>  > 31300 is used.
>  > Now for overlay in Google Maps, 4326 is required.
>  > I have made a copy of my map-file and specified 4326 as projection
>  > system.Yet, non of my data is showing up.
>  >
>  > Do I need to reproject my data for this use ? I thought PostGIS was
>  > capable of doing reprojection on the fly ?
>  >
>  > Can someone with some more experience help me out ?
>  >
>  > Thanks
>  > Steven
>
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