Changes between Version 66 and Version 67 of WKTRaster/SpecificationWorking03

Timestamp:

Apr 21, 2011, 1:35:18 PM (13 years ago)

Author:

Bborie Park

Comment:

—

WKTRaster/SpecificationWorking03

@@ -105 +105 @@
 As part of the process to provide complete implementations of ST_AsJPEG and ST_AsPNG, a method is required to reclassify larger numbers unable to be contained in 8BUI (JPEG and PNG) and 16BUI (PNG). For this reclassification function, we need to get the min and max values of a band, thus ST_MinMax.
 
-1. ST_MinMax(rast raster, nband int) -> record
-
-    returns one record of two columns (min, max)
+1. ST_MinMax(rast raster, nband int, ignore_nodata boolean) -> record
+
+  returns one record of two columns (min, max)
+
+  nband: index of band to process on
+
+  ignore_nodata: if TRUE, any pixel who's value is nodata is ignored.
+
+{{{
+ST_MinMax(rast, 2, TRUE)
+}}}
+
+2. ST_MinMax(rast raster, nband int) -> record
+
+  assumes ignore_nodata = TRUE
 
 {{{
@@ -113 +125 @@
 }}}
 
-2. ST_MinMax(rast raster) -> record
-
-    assumes that the band index = 1
+3. ST_MinMax(rast raster, ignore_nodata boolean) -> record
+
+  assumes band index = 1
+
+{{{
+ST_MinMax(rast, FALSE)
+}}}
+
+4. ST_MinMax(rast raster) -> record
+
+  assumes band index = 1 and ignore_nodata = TRUE
 
 {{{