Changes between Version 147 and Version 148 of WKTRaster/SpecificationWorking03

Timestamp:

Jul 11, 2011, 2:29:45 PM (13 years ago)

Author:

pracine

Comment:

—

WKTRaster/SpecificationWorking03

@@ -370 +370 @@
  * A PL/pgSQL prototype of ST_Union exist in script/plpgsql/st_union.sql.
 
+ * Variants
+
+ 1) ST_Union(raster, band)
+
+ 2) ST_Union(raster, band, p_expression)[[BR]]
+ 3) ST_Union(raster, band, p_expression, p_nodata1expr, p_nodata2expr, p_nodatanodataexpr)
+
+ 4) ST_Union(raster, band, p_expression, t_expression)[[BR]]
+ 5) ST_Union(raster, band, p_expression, p_nodata1expr, p_nodata2expr, p_nodatanodataexpr, t_expression, t_nodata1expr, t_nodata2expr, t_nodatanodataexpr)[[BR]]
+
+
+ 6) ST_Union(raster, band, p_expression, t_expression, f_expression)[[BR]]
+ 7) ST_Union(raster, band, p_expression, p_nodata1expr, p_nodata2expr, p_nodatanodataexpr, t_expression, t_nodata1expr, t_nodata2expr, t_nodatanodataexpr, f_expression, f_nodata1expr, f_nodata2expr, f_nodatanodataexpr)
+
+'''ST_MultibandUnion(raster, band)'''
+
+ * Same as ST_Union but handle multi-band rasters.
 
 '''ST_Accum(raster set|geometry set, 'raster'|'geometry') -> raster/geometry'''
@@ -575 +592 @@
  * When expression is 'LAST' the process can be implemented with GDALRasterizeLayers since, apparently GDALRasterizeLayers do not allow other burning rules.
 
-'''ST_UnionToRaster(set of geometry[, p_expr, t_expr, f_expr]) -> raster'''
+'''ST_UnionToRaster(set of geometry, val[, pixeltype, nodataval, x float8, y float8, pixelsizex, pixelsizey, skewx, skewy, p_expression, p_nodata1expr, p_nodata2expr, p_nodatanodataexpr, t_expression, t_nodata1expr, t_nodata2expr, t_nodatanodataexpr, f_expression, f_nodata1expr, f_nodata2expr, f_nodatanodataexpr]) -> raster'''
 
  * ST_UnionToRaster is an aggregate function very similar to ST_Union(set of raster) which burn, one after the other, all the geometries of a table, or selected by a GROUP BY clause, into a unique raster.
 
- * It is implemented as a wrapper around ST_Union(ST_AsRaster(geometry, value, raster, band, p_expression, t_expression, f_expression)) function.
+ * It is implemented as a wrapper around ST_Union(ST_AsRaster(geometry, value, pixeltype, nodataval, x float8, y float8, pixelsizex, pixelsizey, skewx, skewy), p_expression, p_nodata1expr, p_nodata2expr, p_nodatanodataexpr, t_expression, t_nodata1expr, t_nodata2expr, t_nodatanodataexpr, f_expression, f_nodata1expr, f_nodata2expr, f_nodatanodataexpr)) function.
 
  * Variants
 
- 1) ToRaster(raster, band, geometry, val)
- 2) ToRaster(raster, band, geometry, val, p_expression)
- 3) ToRaster(raster, band, geometry, val, p_expression, t_expression)
- 4) ToRaster(raster, band, geometry, val, p_expression, t_expression, f_expression)
+ 1) ST_UnionToRaster(set of geometry, val)
+
+ 2) ST_UnionToRaster(set of geometry, val, pixeltype, nodataval, x float8, y float8, pixelsizex, pixelsizey, skewx, skewy, p_expression)[[BR]]
+ 3) ST_UnionToRaster(set of geometry, val, pixeltype, nodataval, x float8, y float8, pixelsizex, pixelsizey, skewx, skewy, p_expression, p_nodata1expr, p_nodata2expr, p_nodatanodataexpr)
+
+ 4) ST_UnionToRaster(set of geometry, val, pixeltype, nodataval, x float8, y float8, pixelsizex, pixelsizey, skewx, skewy, p_expression, t_expression)[[BR]]
+ 5) ST_UnionToRaster(set of geometry, val, pixeltype, nodataval, x float8, y float8, pixelsizex, pixelsizey, skewx, skewy, p_expression, p_nodata1expr, p_nodata2expr, p_nodatanodataexpr, t_expression, t_nodata1expr, t_nodata2expr, t_nodatanodataexpr)[[BR]]
+
+
+ 6) ST_UnionToRaster(set of geometry, val, pixeltype, nodataval, x float8, y float8, pixelsizex, pixelsizey, skewx, skewy, p_expression, t_expression, f_expression)[[BR]]
+ 7) ST_UnionToRaster(set of geometry, val, pixeltype, nodataval, x float8, y float8, pixelsizex, pixelsizey, skewx, skewy, p_expression, p_nodata1expr, p_nodata2expr, p_nodatanodataexpr, t_expression, t_nodata1expr, t_nodata2expr, t_nodatanodataexpr, f_expression, f_nodata1expr, f_nodata2expr, f_nodatanodataexpr)
 
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