Changes between Version 170 and Version 171 of WKTRaster/SpecificationWorking03


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Timestamp:
Nov 11, 2011, 6:59:19 AM (12 years ago)
Author:
pracine
Comment:

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  • WKTRaster/SpecificationWorking03

    v170 v171  
    152152 See also: [wiki:WKTRaster/MapAlgebra Notes taken by David Zwarg during the Montreal Code Sprint 2011] and http://trac.osgeo.org/postgis/ticket/860
    153153
    154 
     154'''Details for 3) ST_MapAlgebraFctNgb()'''
     155
     156 This variant works on a tiled coverage. When computing values on the edge of a tile, it has the responsibility to provide out of range value contained in neighbour tiles to the user function.
     157
     158 Open question: What to do when there are more than one pixel (because they are overlapping) value neighbouring the current pixel? Could be another parameter saying take the 'MIN', the 'MAX', the 'FIRST', the 'LAST', the 'MEAN'...
    155159
    156160'''Details for 5) to 8) Two rasters versions'''