Changes between Version 169 and Version 170 of WKTRaster/SpecificationWorking03


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Timestamp:
Nov 10, 2011, 3:08:31 PM (12 years ago)
Author:
pracine
Comment:

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  • WKTRaster/SpecificationWorking03

    v169 v170  
    125125
    126126   DZ: Since this accepts a user function, the user function should determine how to handle NODATA values inside of the neighborhood. These different modes of operating should be arguments to the userfunctions, and not to ST_MapAlgebraFctNgb.
     127
     128   Pierre: They ARE arguments to the user function as are 2 and 2 in this example. But all user function MUST accept at least these three parameters.
    127129
    128130 Any remaining parameters to ST_MapAlgebraNgb could be passed to the summarizing functions for its own need (e.g. "round" to specify that only the pixel forming a circle should be used in the computing).