Changes between Version 15 and Version 16 of WKTRaster/SpecificationWorking02


Ignore:
Timestamp:
Aug 27, 2010, 1:18:44 PM (10 years ago)
Author:
pracine
Comment:

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  • WKTRaster/SpecificationWorking02

    v15 v16  
    1919 
    2020
     21'''ST_Intersects(raster, raster)'''[[BR]]
    2122'''ST_AsRaster(geometry, pixelsize) -> raster'''[[BR]]
    22 '''ST_Intersects(raster, raster)'''[[BR]]
    23 '''Changes to ST_Intersection or use ST_MapAlgebra'''
    24  
     23'''ST_Intersection(geometry, raster, band) -> raster'''
     24
     25 Rasterize the geometry as a new raster (ST_AsRaster(geometry, pixeltype, val, nodataval, raster)) and then copy only pixels for which both raster bands have a value. Optionally trim the raster to withvalue extent.
     26
     27 Variants
     28
     29  ST_Intersection(geometry, val, raster, band) -> raster with the same metadatada as the provided raster. Non intersecting pixels are filled with nodata values.
     30
     31  ST_Intersection(geometry, val, raster, band, “TRIM”) -> raster with the same metadatada as the provided raster but the extent is reduced to the geometry extent. Non intersecting pixels are filled with nodata values.
     32
    2533----
    2634== '''Objective B02x - Being able to use "group by" to accumulate tiles to form a new raster.''' ==