[postgis-users] Raster to Polygon vector cell

[Pierre Racine]

Andreas,

This is one of the operation WKT Raster was made for. See the tutorial:

http://trac.osgeo.org/postgis/wiki/WKTRasterTutorial01

You will need to compile (if you are on Linux) or install (on Windows) the WKT Raster PostGIS extension. You import your shapefiles, you import your raster, then you do the proper query.

Pierre

From: postgis-users-bounces at postgis.refractions.net [mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of Andreas Forø Tollefsen
Sent: 21 août 2010 14:49
To: postgis-users at postgis.refractions.net
Subject: [postgis-users] Raster to Polygon vector cell

Hi.

I have been searching for a way to join raster values to polygons.
In my case there is only one raster value within each polygon, and I would like this value to be joined into a column in the polygon table.
The process would in other GIS programs probably look like this:

Raster Data -> Point Features -> Spatial Join to Polygons (with raster value as new column for each polygon).

Any ideas how one would formulate this?

Thanks.
Andreas
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