Changes between Version 212 and Version 213 of WKTRaster/SpecificationWorking03

Timestamp:

07/25/12 10:30:38 (11 months ago)

Author:

pracine

Comment:

--

WKTRaster/SpecificationWorking03

@@ -18 +18 @@
 
  * Work on ST_MapAlgebra()
-  * Break up RASTER_mapAlgebra2 so that the main engine is in rt_core instead of rt_pg.  This is needed for C-based aggregate functions that run against MapAlgebra.
+  * Break up RASTER_mapAlgebra2 so that the main engine is in rt_core instead of rt_pg.  This is needed for C-based aggregate functions that run against ST_MapAlgebra.
+  * Multiband ST_MapAlgebra(raster, raster)
   * Optimized version of two rasters ST_MapAlgebra setting pixel areas when possible instead of just pixels by pixels
-  * Multiband ST_MapAlgebra(raster, raster)
   * ST_MapAlgebraFctNbg working on a tiled coverage
 
- * Different variant of ST_SetValues()
- * ST_CreateOverview(), ST_IsRegularlyTiled(), ST_HasOverlaps(), ST_HasGaps(), ST_HasTileSameSize(), ST_HasTileAligned()
- * C version of the ST_Union(raster) aggregate
+ * Different variant of ST_SetValues() (Objective FV.23 below)
+ * ST_CreateOverview(), ST_IsRegularlyTiled(), ST_HasOverlaps(), ST_HasGaps(), ST_HasTileSameSize(), ST_HasTileAligned()(Objective FV.20 below)
+ * C version of the ST_Union(raster) aggregate (Ticket #1364).
  * ST_Retile()
+ * Add ST_Union() variants to be able to pass temporary expressions.
  * Multi-band ST_AddBand()
- * ST_UnionToRaster() and ST_BurnToRaster()
- * Set and update of the IsNodataValue flag indicating the whole band is nodata.
+ * ST_UnionToRaster() and ST_BurnToRaster() (Objective FV.19 below)
+ * Set and keep up to date the !IsNodataValue flag indicating that the whole band is nodata and add related optimizations. (Objective FV.22 below and Ticket #593)
  * Subtiling of rasters (PostGIS 3.0 or create a new raster type)
 
@@ -280 +281 @@
 
 ----
-== '''Objective FV.06 - Being able to do some base raster operations.''' ==
- 
-
-'''ST_Area(raster|geometry) -> double'''
-
-'''ST_ValueCount(raster, value) -> integer - done see below'''
-
-'''ST_ValuePercent(raster, value) -> double precision - done see below'''
-
-'''ST_Resample(raster, method, originx, originy, pixelsizex, pixelsizey) -> raster - done see below'''
-
-'''ST_SelectByValue(raster, 'expression') -> same type as first argument'''
-
- * Not really useful since it is the same as ST_MapAlgebra(rast, 'CASE WHEN rast < x OR rast = y THEN rast ELSE NULL END') which is already implemented.
-
-'''ST_Clip(raster|geometry,geometry) -> same type as first argument'''[[BR]]
+== '''Objective FV.06 - Being able to do some basic raster operations.''' ==
+
+
 '''ST_Flip(raster|geometry, 'vertical'|'horizontal') -> same type as first argument'''
 
@@ -311 +299 @@
 '''ST_isvalid(raster|geometry) -> boolean'''
  
-----
-== '''Objective FV.09 - Being able to use other major topological operators''' ==
- 
-
-'''ST_Within(raster|geometry A, raster|geometry B)'''[[BR]]
-'''ST_Contains(raster|geometry A, raster|geometry B)'''[[BR]]
-'''ST_Overlaps(raster|geometry, raster|geometry)'''
+
 
 ----
@@ -599 +581 @@
 
 ----
-
-== Accomplished objectives ==
+== Cancelled Objectives ==
+
+'''These now work by first converting the raster using ST_Polygon(raster)'''
+
+'''ST_Area(raster|geometry) -> double'''
+
+== Accomplished Objectives ==
+
+'''ST_ValueCount(raster, value) -> integer - done see below'''
+
+'''ST_ValuePercent(raster, value) -> double precision - done see below'''
+
+'''ST_Resample(raster, method, originx, originy, pixelsizex, pixelsizey) -> raster - done see below'''
+
+'''ST_SelectByValue(raster, 'expression') -> same type as first argument'''
+
+'''ST_Clip(raster|geometry,geometry) -> same type as first argument'''
+
+----
+== '''Objective FV.09 - Being able to use other major topological operators''' ==
+ 
+
+'''ST_Within(raster|geometry A, raster|geometry B)'''[[BR]]
+'''ST_Contains(raster|geometry A, raster|geometry B)'''[[BR]]
+'''ST_Overlaps(raster|geometry, raster|geometry)'''