[geotk] Need some help to work with geotoolkit-pending module

[johann sorel]

You simply can not have geographic datas without a Coordinate reference 
system specified somehow.
Each crs, have completely different extends and units, for exemple 
ESPG:4326 goes from -180 to 180 in degree units
while EPSG:3395 goes from (if I remember well) -2100000 to 2100000 in 
meters units.
So without the srid defined in postgis, we can not access the datas 
correctly nor render it correctly.

In the worst case, if you can't find out the srid you can always give 
your datas a fake one, this will allow
you to open the datas and render them on the map but you must keep in 
mind that the geometries will be incorrect (wrong scale, coordinates and 
shape).

johann

suneesh kumar a écrit :
> Hi,
>
> Thanks for your reply.
> I have SIRD set to -1 in the table. I have a line like this in the 
> table structure..   CONSTRAINT enforce_srid_wkb_geometry CHECK 
> (srid(wkb_geometry) = (-1))
>
> I have imported the data from shape file into postgis. There was no 
> projection file with the shape file. It is shape of land plots. They 
> have digitized by saning the paper map images. I was thinking to deal 
> it as some Cartesian polygons. Am I doing wrong? What to do if I do 
> not know the CRS? I just wanted to  show the images of the plots.
>
> I am new to GIS. Please advice me.
>
> Thank you again,
>
> Sunish./
>
>
>
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