From: Regina Obe Date: Sun, 7 Sep 2014 16:48:39 +0000 (+0000) Subject: #2920 stab at explaining requirement for alignment and add more detail to ST_SameAlig... X-Git-Tag: 2.2.0rc1~853 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=54537e56cecaeb741ea3be5c4d633bd91825bb14;p=postgis #2920 stab at explaining requirement for alignment and add more detail to ST_SameAlignment git-svn-id: http://svn.osgeo.org/postgis/trunk@12952 b70326c6-7e19-0410-871a-916f4a2858ee --- diff --git a/doc/reference_raster.xml b/doc/reference_raster.xml index cd9d16c1b..e8380c4d5 100644 --- a/doc/reference_raster.xml +++ b/doc/reference_raster.xml @@ -11126,6 +11126,10 @@ UPDATE wind Description Returns the union of a set of raster tiles into a single raster composed of at least one band. The resulting raster's extent is the extent of the whole set. In the case of intersection, the resulting value is defined by uniontype which is one of the following: LAST (default), FIRST, MIN, MAX, COUNT, SUM, MEAN, RANGE. + + + In order for rasters to be unioned, they most all have the same alignment. Use and for more details and help. One way to fix alignment issues is to use and use the same reference raster for alignment. + Availability: 2.0.0 Enhanced: 2.1.0 Improved Speed (fully C-Based). @@ -14132,7 +14136,7 @@ SELECT r1.rid, r2.rid, ST_Touches(r1.rast, 1, r2.rast, 1) FROM dummy_rast r1 CRO ST_SameAlignment - Returns true if rasters have same skew, scale, spatial ref and false if they don't with notice detailing issue. + Returns true if rasters have same skew, scale, spatial ref, and offset (pixels can be put on same grid without cutting into pixels) and false if they don't with notice detailing issue.