[postgis-users] ST_Mapalgebra
Bborie Park
bkpark at ucdavis.edu
Tue Nov 22 09:31:25 PST 2011
On Tue, Nov 22, 2011 at 9:27 AM, Joan <wamaithajoan at gmail.com> wrote:
> Hi,
>
> How can I perform ST_MapAlgebraExpr with raster layers that have different
> scale_x, scale_y. I suppose that the difference causes the two raster layers
> to be aligned differently
> Joan
Joan,
You'll need to resample one of the rasters to be aligned with the
other raster. Something like:
ST_Resample(rast2, rast1)
That'll resample rast2 to be aligned with rast1. So, you should be
able to use that with ST_MapAlgebraExpr...
ST_MapAlgebraExpr(rast1, ST_Resample(rast2, rast1), ...)
-bborie
--
Bborie Park
Programmer
Center for Vectorborne Diseases
UC Davis
530-752-8380
bkpark at ucdavis.edu
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