[postgis-users] Problem in Clip between geometry and raster table

[Marcello Benigno]

Hello guys,

When attempting to perform a clip from a polygon and a raster table , the
following error appeared:

ERROR:  column "nan" does not exist
> LINE 1: SELECT (NaN)::double precision
>                 ^
> QUERY:  SELECT (NaN)::double precision
> CONTEXT:  PL/pgSQL function st_clip(raster,integer,geometry,double
> precision[],boolean) line 42 at assignment
> SQL function "st_clip" statement 1
> (execution time: 250 ms; total time: 485 ms)
>  SELECT (ST_DumpAsPolygons(ST_Clip(c.geom, ST_Buffer(f.geometria, 0.01),
> TRUE))).val AS dn,
>   (ST_DumpAsPolygons(ST_Clip(c.geom, ST_Buffer(f.geometria, 0.01),
> TRUE))).geom AS geom
> FROM public.propriedade_geometria f, dados.edr c
> WHERE  ST_Intersects(f.geometria, c.geom)
> AND f.tipo = 2 AND f.propriedade_id = 6063 AND c.id_uf = 2 AND c.cidade_id
> = 4681;


I can't understand what may be happening. Can I perform a casting to solve
this problem ?

-- 
*Marcello Benigno B. de Barros Filho*
Prof. do Curso Superior de Tecnologia em Geoprocessamento - IFPB
Mestre em Ciências Geodésicas e Tecnologias da Geoinformação - UFPE
Doutorando em Tecnologia Ambiental e Recursos Hídricos - UFPE
http://profmarcello.blogspot.com
http://about.me/marcello.benigno
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