[postgis-users] ST_Raster question, Use spot heights and create an Elevation raster layer

Pierre Racine Pierre.Racine at sbf.ulaval.ca
Tue Feb 28 10:58:36 PST 2012

> I get to see the elevation now for my geometry and raster. I now want to
> introduce some artificial points that are equidistant (say 10 mts apart) on each
> road segment.. and then compute their intersection with the raster.
> Is it better to first divide the lines into such points and then compute their
> intersections with the raster? Or break the linestring that I get back after
> intersection? I have an idea of how I might be able to do this, but just wanted to
> confirm what will perform better.

Try both and let us know.


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