Changes between Version 38 and Version 39 of WKTRaster/SpecificationWorking02
- 09/21/10 08:04:55 (3 years ago)
v38 v39 37 37 Returns a one band raster which pixel values are the mathematical expression of another raster band. 38 38 39 The expression is any PostgreSQL valid expression returning a number. In the one raster version of ST_MapAlgebra, the value of the current pixel is expressed in the expression by "rast". E.g. "cos(rast)" or "rast / 2" 39 The expression is any PostgreSQL valid expression returning a number. 40 40 41 41 An extra nodata value expression, applying only to nodata values pixel, can be provided. 42 43 42 44 43 45 In the one raster version of ST_MapAlgebra, the resulting raster conserve the size, the georeference, the alignment and the SRID of the provided raster.