Changes between Version 36 and Version 37 of WKTRaster/SpecificationWorking03
- Timestamp:
- 03/14/11 11:16:40 (14 years ago)
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WKTRaster/SpecificationWorking03
v36 v37 209 209 The "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: 210 210 211 *"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. 216 214 217 215 Users could write their own map algebra summarizing functions.