[postgis-devel] [PostGIS] #590: [raster] Two rasters version of ST_MapAlgebra
PostGIS
trac at osgeo.org
Thu Oct 20 16:41:39 PDT 2011
#590: [raster] Two rasters version of ST_MapAlgebra
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Reporter: pracine | Owner: dustymugs
Type: task | Status: assigned
Priority: critical | Milestone: PostGIS 2.0.0
Component: postgis raster | Version: trunk
Keywords: |
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Comment(by dustymugs):
I don't believe we want an additional parameter specifying which raster is
the primary raster as per:
{{{
An optional option could be added to allow specifying which raster,
between the first and the second, is the MASTER raster. The MASTER raster
is used to determine the pixeltype, the alignment and the nodatavalue of
the resulting raster. If the MASTER raster do not have a nodata value
defined and it is necessary to set one in the resulting raster then the
minimal possible value for the pixeltype should be used as nodata value.
In case this option would not be added or in case it is not passed to the
function, the first raster should be used to determine those informations.
}}}
Instead, whichever raster is provided first to ST_MapAlgebra should be the
MASTER/primary raster.
--
Ticket URL: <http://trac.osgeo.org/postgis/ticket/590#comment:11>
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