Changes between Version 6 and Version 7 of WKTRaster/SpecificationWorking03

Timestamp:

02/20/10 09:21:17 (15 years ago)

Author:

dzwarg

Comment:

Added ST_Resample notes

WKTRaster/SpecificationWorking03

@@ -39 +39 @@
 '''ST_Count(raster, value) -> integer'''[[BR]]
 
-'''ST_Resample(raster, pixelsize, method) -> raster'''
+'''ST_Resample(raster, method, originx, originy, pixelsizex, pixelsizey) -> raster'''
 
-Recompute a raster in order to change its pixel size and/or the position of its upper left corner.
+ Variant 1: ST_Resample(raster, method, raster) -> raster
 
+ Recompute a raster in order to change its pixel size and/or the position of its upper left corner.
+
+ The second parameter is the resampling method performed when computing new pixel values:
+  1) 'NEAREST NEIGHBOR'[[BR]]
+  2) 'LINEAR'[[BR]]
+  3) 'BICUBIC'
+
+ The 3rd or 3rd-6th parameters define the pixel size of the resampling operation. For the 3rd parameter variant, the pixel size is taken from the pixel size of the raster parameter. For the 3rd-6th parameter variant, the pixel origin and dimensions are explicitly defined.
 
 '''ST_SelectByValue(raster|geometry, ‘expression’) -> same type as first argument'''[[BR]]
@@ -49 +57 @@
 '''ST_MapAlgebra(raster|geometry, [raster|geometry,…] ‘mathematical expression’, ‘raster’ |’geometry’) -> raster/geometry'''
 
- Variant 1: ST_MapAlgebra(raster|geometry, [raster|geometry,…] ‘mathematical expression’, ‘raster’ |’geometry’, originx, originy, pixelsizex, pixelsizey, rotation ) -> raster/geometry
+ Variant 1: ST_MapAlgebra(raster|geometry, [raster|geometry,…] ‘mathematical expression’, ‘raster’ |’geometry’, originx, originy, pixelsizex, pixelsizey) -> raster/geometry
 
  Variant 2: ST_MapAlgebra(raster|geometry, [raster|geometry,…] 'mathematical expression', 'raster' |'geometry', integer) ->raster/geometry