Changes between Version 37 and Version 38 of WKTRaster/SpecificationFinal01

Timestamp:

08/27/10 14:29:10 (3 years ago)

Author:

pracine

Comment:

--

WKTRaster/SpecificationFinal01

@@ -156 +156 @@
  This polygon geometry might contain holes if some internal areas of the raster contain pixels with NODATA values.
 
- Variant 1: ST_Polygon(raster) -> polygon geometry -- default to band # 1
+ '''Variants'''
+
+  1) ST_Polygon(raster, integer) -> polygon geometry
+  2) ST_Polygon(raster) -> polygon geometry -- default to band # 1
 
  '''Implementation details'''
@@ -171 +174 @@
 
   1) ST_DumpAsPolygons(raster, integer) -> geomval set
-
   2) ST_DumpAsPolygons(raster) -> geomval set -- default to band # 1
 
@@ -214 +216 @@
  '''Variants'''
 
- 1) ST_Intersects(geometry, raster, integer) -> boolean -- the third parameter is the raster band number
-
- 2) ST_Intersects(geometry, raster) -> boolean -- default to band # 1
- 
- 3) ST_Intersects(raster, geometry) -> boolean -- default to band # 1
+  1) ST_Intersects(geometry, raster, integer) -> boolean -- the third parameter is the raster band number
+  2) ST_Intersects(geometry, raster) -> boolean -- default to band # 1
+  3) ST_Intersects(raster, geometry) -> boolean -- default to band # 1
 
  This function permform a full intersection test and proceed in three steps to determine if the raster intersects with the geometry:
@@ -244 +244 @@
 '''ST_Intersection(raster, integer, geometry) -> geometry''' - Returns a set of "geomval" value representing the shared portion of the geometry and the raster band areas sharing a common meaningfull values. The integer parameter is the band number of the raster.
 
- Variants: 
+ '''Variants''' 
 
   1) ST_Intersection(raster, geometry) -> geometry -- default to band # 1[[BR]]
@@ -269 +269 @@
  This function should be implemented as a pl/pgSQL function (possibly only a SQL function) performing the intersection between the provided geometry and the table generated by ST_DumpAsPolygons(raster).
 
- Priority 1 should be given to the raster/geometry variants (original and variant 1) returning a geometry. 
-
- Priority 2 should be given to the raster/raster variants (5) returning a geometry. 
-
- Priority 3 should be given to the other variants (2, 3 & 4) returning a raster. Variant 2 & 3 should be implemented after the planned ST_AsRaster(geometry) function. What should be the raster result of the intersection of two rasters is still to be specified.
-
 ----
 == '''Objective 0.1.6f - Being able to set all the properties of a raster.''' ==
@@ -284 +278 @@
 '''ST_SetPixelSize(raster, pixelsize)'''
 
- Variant 1: ST_SetPixelSize(raster, xsize, ysize)
-
- Set the pixel size (cell size) on the specified raster. The base method sets the X and Y pixel size to the same value. The first variant sets the pixel sizes to the individually specified x and y sizes.
+ '''Variants'''
+
+  1) ST_SetSRID(raster, integer)
+  2) ST_SetPixelSize(raster, xsize, ysize)
+
+ Set the pixel size (cell size) on the specified raster. The base method sets the X and Y pixel size to the same value. Variant 2 sets the pixel sizes to the individually specified x and y sizes.
 
 '''ST_SetBandNoDataValue(raster, band, value)'''
@@ -302 +299 @@
 '''ST_SetGeoReference(raster, georef)'''
 
- Variant 1: ST_SetGeoReference(raster, georef, format)
+ '''Variants'''
+
+  1) ST_SetGeoReference(raster, georef, format)
+  2) ST_SetGeoReference(raster, georef)
 
  Set the georeference fields of the raster (pixel size, skew, upper left location) all in one pass. The 'format' parameter is optional, and defaults to 'GDAL' georeference format if it is not specified.
@@ -310 +310 @@
 '''ST_SetSkew(raster, skewx, skewy)'''
 
- Variant 1: ST_SetSkew(raster, skew)
-
- Set the skewx and the skewy of the raster's georeference. Variant 1 sets the X and Y skew to the same value.
+ Variants
+
+  1) ST_SetSkew(raster, skewx, skewy)
+  2) ST_SetSkew(raster, skew)
+
+ Set the skewx and the skewy of the raster's georeference. Variant 2 sets the X and Y skew to the same value.
 
 '''ST_SetUpperLeft(raster, left, top)'''