[postgis-users] How to reproject data with custom projection?

[Ben Madin]

Aren,

You need a reference projection, you are correct. 

For the sake of the exercise, bookmark 

http://spatialreference.org/

and then try the search box for parts of the string which are maybe unusual :

I tried

"Standard_Parallel_1",27.5 Lambert_Conformal_Conic

in the search box.

then I reckon you can probably choose any of the three results I get - there appears to be very little difference between them and your string.

If you haven't used this site before, looking at the 

Well Known Text as HTML
Human-Readable OGC WKT
Proj4
OGC WKT
JSON
GML
ESRI WKT
.PRJ File
options will help.

Good luck (from the antipodes, so take your chances)

cheers

Ben



On 09/01/2011, at 3:18 PM, Aren Cambre wrote:

> I have a SHP with this in its PRJ file:
> 
> PROJCS["Custom",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1500000.0],PARAMETER["False_Northing",5000000.0],PARAMETER["Central_Meridian",-100.0],PARAMETER["Standard_Parallel_1",27.5],PARAMETER["Standard_Parallel_2",35.0],PARAMETER["Central_Parallel",18.0],UNIT["Meter",1.0]]
> 
> I need to get this into 3081 somehow since it's a good projection for Texas.
> 
> I have some 3081-reprojected PoistGIS data (originally 4269) for Texas already. If I load this SHP into QGIS along with other 3081 data, it appears well below the other data. QGIS indicates this SHP has a custom projection.
> 
> If I am not mistaken, to reproject with PostGIS, I need something besides -1 in the geometry table. So I guess I need to specify some SRID with -s when I run shp2pgsql? If so, what projection is this?
> 
> Thanks, and I apologize in advance for my naivety.
> 
> Aren
> _______________________________________________
> postgis-users mailing list
> postgis-users at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20110109/b8309131/attachment.html>