Changes between Version 153 and Version 154 of WKTRaster/SpecificationWorking03

Timestamp:

09/20/11 07:39:07 (13 years ago)

Author:

dustymugs

Comment:

updates to ST_AsRaster

WKTRaster/SpecificationWorking03

@@ -38 +38 @@
 Special case where a raster may be fully contained within another raster's cell (the entirety of A within a cell of B):
 
-1. using a 3x3 search pattern, test each selected cell's geopoint (excluding no data by default unless exclude_nodata_value = FALSE) of A to that of B for overlap.
+1. using every third pixel by row and column, test each selected cell's geopoint (excluding no data by default unless exclude_nodata_value = FALSE) of A to that of B for overlap.
 
 2. if a cell of A does overlap a cell of B, return true.
@@ -46 +46 @@
 Actual testing involves the use of calculating the intersection of grid lines between A and B
 
-1. Using A's columns and B's rows in a 3x3 search pattern, calculate the intersection point of each pair of grid lines.
+1. Using every third A's column and B's row, calculate the intersection point of each pair of grid lines.
 
 2. If intersection point doesn't exist or is outside the bounds of the end points comprising each grid line used, go back to step 1.
@@ -60 +60 @@
 7. If after all the searching and testing, nothing intersects or touches, return false.
 
-A set of ST_Intersects functions:
+A set of ST_Intersects functions for rasters:
 
 1. ST_Intersects(raster rastA, raster rastB, integer bandA DEFAULT NULL, integer bandB DEFAULT NULL) -> boolean 
@@ -1241 +1241 @@
         value double precision[] DEFAULT ARRAY![1]::double precision[],[[BR]]
         nodataval double precision[] DEFAULT ARRAY![0]::double precision[],[[BR]]
-        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0
+        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0,[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster
 
@@ -1267 +1268 @@
 
     skewy: the skew along the Y axis of the raster. by default, the skew along the X axis is zero.
+
+    touched: from the GDAL man page for gdal_rasterize: "Enables the ALL_TOUCHED rasterization option so that all pixels touched by lines or polygons will be updated not just those one the line render path, or whose center point is within the polygon. Defaults to disabled for normal rendering rules."
 
 ''If the number of elements for pixeltype, value and nodataval do not match, the minimum number of elements will be used.'' 
@@ -1277 +1280 @@
         nodataval double precision[] DEFAULT ARRAY![0]::double precision[],[[BR]]
         upperleftx double precision DEFAULT NULL, upperlefty double precision DEFAULT NULL,[[BR]]
-        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0
+        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0,[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster
 
@@ -1287 +1291 @@
         value double precision[] DEFAULT ARRAY![1]::double precision[],[[BR]]
         nodataval double precision[] DEFAULT ARRAY![0]::double precision[],[[BR]]
-        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0
+        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0,[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster
 
@@ -1297 +1302 @@
         nodataval double precision[] DEFAULT ARRAY![0]::double precision[],[[BR]]
         upperleftx double precision DEFAULT NULL, upperlefty double precision DEFAULT NULL,[[BR]]
-        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0
+        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0,[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster
 
@@ -1307 +1313 @@
         value double precision DEFAULT 1,[[BR]]
         nodataval double precision DEFAULT 0,[[BR]]
-        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0[[BR]]
+        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0,[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster
 
@@ -1317 +1324 @@
         nodataval double precision DEFAULT 0,[[BR]]
         upperleftx double precision DEFAULT NULL, upperlefty double precision DEFAULT NULL,[[BR]]
-        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0
+        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0,[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster
 
@@ -1327 +1335 @@
         value double precision DEFAULT 1,[[BR]]
         nodataval double precision DEFAULT 0,[[BR]]
-        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0
+        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0,[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster
 
@@ -1337 +1346 @@
         nodataval double precision DEFAULT 0,[[BR]]
         upperleftx double precision DEFAULT NULL, upperlefty double precision DEFAULT NULL,[[BR]]
-        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0
+        skewx double precision DEFAULT 0, skewy double precision DEFAULT 0,[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster
 
@@ -1345 +1355 @@
         pixeltype text[] DEFAULT ARRAY!['8BUI']::text[],[[BR]]
         value double precision[] DEFAULT ARRAY![1]::double precision[],[[BR]]
-        nodataval double precision[] DEFAULT ARRAY![0]::double precision[]
+        nodataval double precision[] DEFAULT ARRAY![0]::double precision[],[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster
 
@@ -1353 +1364 @@
         pixeltype text,[[BR]]
         value double precision DEFAULT 1,[[BR]]
-        nodataval double precision DEFAULT 0
+        nodataval double precision DEFAULT 0,[[BR]]
+        touched boolean DEFAULT FALSE
 ) -> raster