Changes between Version 30 and Version 31 of WKTRaster/SpecificationFinal01

Timestamp:

08/27/10 12:22:05 (14 years ago)

Author:

pracine

Comment:

--

WKTRaster/SpecificationFinal01

@@ -170 +170 @@
  Variant 1: ST_DumpAsPolygons(raster) -> geomval set -- default to band # 1
 
- This function should be used with precaution on raster with float pixel type as it could return one "geomval" (or polygon) per pixel. This kind of raster should be reclassified (using the planned ST_Reclassify(raster,...) function) before using ST_DumpAsPolygons().
+ This function should be used with precaution on raster with float pixel type as it could return one "geomval" (or polygon) per pixel. This kind of raster should be reclassified (using the planned ST_Reclass(raster,...) function) before using ST_DumpAsPolygons().
 
  '''Implementation details'''
@@ -193 +193 @@
 '''DumpAsWKTPolygons(raster, integer) -> wktgeomval set''' - Returns a set of "geomval" value, one for each group of pixel sharing the same value for the provided band.
 
- Variant 1: DumpAsWKTPolygons(raster) -> wktgeomval set -- default to band # 1
-
  This is a set-returning function (SRF). A "wktgeomval " value is a complex type composed of a the wkt representation of a geometry (one for each group of pixel sharing the same value) and the value associated with this geometry. These values are always returned as a value of type double precision. The shape of each polygon follow pixels edges. Areas with NODATA values are not included in the resulting set.
 
- This function should be used with precaution on raster with float pixel type as it could return one "geomval" (or polygon) per pixel. This kind of raster should be reclassified (using the planned ST_Reclassify(raster,...) function) before using DumpAsWKTPolygons().
+ This function should be used with precaution on raster with float pixel type as it could return one "geomval" (or polygon) per pixel. This kind of raster should be reclassified (using the planned ST_Reclass(raster,...) function) before using DumpAsWKTPolygons().
 
  DumpAsWKTPolygons() should not be used directly. Use ST_DumpAsPolygons() instead.