Changes between Version 36 and Version 37 of WKTRaster/SpecificationWorking03


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Timestamp:
03/14/11 11:16:40 (14 years ago)
Author:
pracine
Comment:

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  • WKTRaster/SpecificationWorking03

    v36 v37  
    209209The "ST_Avg" summarizing function should accept three parameters: an array of float8 values, a X and a Y dimension, and optionnally a "what to do with nodata values". The possible value for this last parameter could be:
    210210
    211  *"NULL": If any value is a nodata value, return NULL.
    212 
    213  *"ignore": Ignore any nodata value so that if 4 pixels on 25 are nodata values, do the computation with the 21 remaining.
    214 
    215  *a value: Replace any nodata value with this value and compute.
     211 * "NULL": If any value is a nodata value, return NULL.
     212 * "ignore": Ignore any nodata value so that if 4 pixels on 25 are nodata values, do the computation with the 21 remaining.
     213 * a value: Replace any nodata value with this value and compute.
    216214
    217215Users could write their own map algebra summarizing functions.