Changes between Version 165 and Version 166 of WKTRaster/SpecificationWorking03


Ignore:
Timestamp:
11/09/11 06:10:24 (13 years ago)
Author:
pracine
Comment:

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  • WKTRaster/SpecificationWorking03

    v165 v166  
    189189 * Open Question 1 (DZ): Should ST_MapAlgebra resample the resulting rasters internally, or should we let the users resample it afterward with ST_Resample: ST_Resample(ST_MapAlgebra(), originx, originy, pixelsizex, pixelsizey)[[BR]]
    190190   PR: I think this would greatly contribute to simplify the API.
     191
     192List of functions implementable based on the two raster version of map algebra:
     193
     194 * ST_Intersection(raster, raster) See at the end of [http://trac.osgeo.org/postgis/browser/trunk/raster/scripts/plpgsql/st_mapalgebra.sql plpgsql/st_mapalgebra.sql]
     195 * ST_Union (raster, raster) not the aggregate one. See at the end of [http://trac.osgeo.org/postgis/browser/trunk/raster/scripts/plpgsql/st_mapalgebra.sql plpgsql/st_mapalgebra.sql]
     196 * ST_Difference() and ST_SymDifference() See at the end of [http://trac.osgeo.org/postgis/browser/trunk/raster/scripts/plpgsql/st_mapalgebra.sql plpgsql/st_mapalgebra.sql]
     197 * ST_Intersection(raster, raster) See at the end of [http://trac.osgeo.org/postgis/browser/trunk/raster/scripts/plpgsql/st_mapalgebra.sql plpgsql/st_mapalgebra.sql]
     198 * ST_Clip(raster, geometry) as a wrapper around ST_Intersection(raster, ST_AsRaster(geometry))
     199 * ST_BurnToRaster(): specifications below.
    191200
    192201'''Details for 5) ST_MapAlgebraExpr(rast1 raster, band1 integer, rast2 raster, band2 integer, expression text, pixeltype text, extentexpr text, nodata1expr text, nodata2expr text, nodatanodataexpr text) -> raster'''