Changes between Version 60 and Version 61 of WKTRaster/SpecificationWorking03

Timestamp:

04/10/11 10:17:45 (14 years ago)

Author:

dustymugs

Comment:

ST_MinMax

WKTRaster/SpecificationWorking03

@@ -100 +100 @@
 
 ''' Open Question: ''' Should the function fail if an index is invalid?  How should this work when providing more than one indices to the function?
+
+----
+'''ST_MinMax(raster, nband) -> record'''[[BR]]
+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.
+
+ST_MinMax(rast raster, nband int) -> record
+
+    returns one record of two columns (min, max)
+
+{{{
+ST_MinMax(rast, 2)
+}}}
+
+ST_MinMax(rast raster) -> record
+
+    assumes that the band index = 1
+
+{{{
+ST_MinMax(rast)
+}}}
 
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