[postgis-users] ST_Slope

Pierre Racine Pierre.Racine at sbf.ulaval.ca
Wed Mar 21 12:09:04 PDT 2012

It is just a way to assign a unique value to each pixels of the raster. To create a fake raster not having a unique value like what ST_AddBand do.


> Can I query what the '([rast.x] - 1) * 10 + [rast.y]') section of the equation is?
> I can't seem to understand what it does.
> James

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