Changes between Version 244 and Version 245 of WKTRaster/SpecificationWorking03


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Timestamp:
Oct 2, 2012, 12:59:51 PM (12 years ago)
Author:
pracine
Comment:

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  • WKTRaster/SpecificationWorking03

    v244 v245  
    498498  This function can further be generalised by adding parameters to define a buffer area around the pixel centroid or the pixel boundary. This would provide a category 4 type of function. (e.g. ST_Density())
    499499
    500  The first series of METHODs return statistics about the intersection of the footprint of each pixel:
     500 The first series of METHODs return statistics about the intersection of the footprint of each pixel (the intersecting area with polygons must be greater than 0.0000000001 to be considered):
    501501
    502502  * with any kind of coverage, returning value frequencies: COUNT_OF_VALUES, COUNT_OF_DISTINCT_VALUES, COUNT_OF_MOST_FREQUENT_VALUE, COUNT_OF_LEAST_FREQUENT_VALUE
    … …  
    511511
    512512  * with a line coverage, returning the value of lines weighted by their lengths: LENGTH_WEIGHTED_SUM_OF_VALUES, LENGTH_WEIGHTED_MEAN_OF_VALUES, LENGTH_WEIGHTED_STDDEV_OF_VALUES
    513 
    514   * with a polygon coverage, returning value frequencies: COUNT_OF_VALUES_HAVING_NON_NULL_AREA
    515513
    516514  * with a polygon coverage, returning area stats: FIRST_AREA, LAST_AREA, MIN_AREA, MAX_AREA, RANGE_OF_AREAS, SUM_OF_AREAS, MEAN_OF_AREAS, STDDEV_OF_AREAS