[postgis-devel] [PostGIS] #860: [raster] Modify ST_MapAlgebra to handle expressions and user-functions
PostGIS
trac at osgeo.org
Mon Oct 17 07:37:08 PDT 2011
#860: [raster] Modify ST_MapAlgebra to handle expressions and user-functions
----------------------------+-----------------------------------------------
Reporter: dzwarg | Owner: pracine
Type: enhancement | Status: new
Priority: blocker | Milestone: PostGIS 2.0.0
Component: postgis raster | Version: trunk
Keywords: history |
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Comment(by robe):
I think you have a typo in the last example:
shouldn't:
{{{
ST_MapAlgebraFct(rast_view,1,NULL,'tan(rast)*rast')
}}}
Be:
{{{
ST_MapAlgebraFct(rast_view,1,NULL,'rast_plus_tan(float,text[])'::regprocedure')
}}}
Also it is unclear from the description what the args argument is for an
if all userdefined functions require a second text[]. For example the
rast_plus_tan functions takes a text[] as second arg but never uses it.
--
Ticket URL: <http://trac.osgeo.org/postgis/ticket/860#comment:17>
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