[postgis-users] st_union(rast) returning null because of non alignment,

Rhys A.D. Stewart rhys.stewart at gmail.com
Wed Nov 7 14:32:37 PST 2012


Greetings,

according to the trusty docs online two rasters are aligned when
they share the same skew, scale and srid. Created a raster using
st_asraster  and according to st_metadata scale, skew and srid are all
equal. Howvere st_unon complains saying that 'The two rasters provided do
not have the same alignment.  Returning NULL'

I noticed that  ticket #1336 as possibly relating to my issue, but I'm not
entirely sure. My posgis version is:
POSTGIS="2.0.0 r9605" GEOS="3.3.3-CAPI-1.7.4" PROJ="Rel. 4.8.0, 6 March
2012" GDAL="GDAL 1.9.0, released 2011/12/29" LIBXML="2.7.8"
LIBJSON="UNKNOWN" TOPOLOGY RASTER

What am I missing or doing incorrectly?

Regards,

Rhys
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