Hi!
I haven't worked with PostGIS yet but with my Shapefiles I use
EXPRESSION like this:
LAYER
NAME admin
DATA "/mypath/"
TEMPLATE '../templates/'
STATUS ON
TYPE POLYGON
CLASSITEM "NAT"
CLASS
NAME 'Belgium'
EXPRESSION 'BE'
STYLE
COLOR 255 255 255
END
END
CLASS
NAME 'Germany'
EXPRESSION 'GM'
STYLE
COLOR 237 237 237
END
END
END
I define CLASSITEM before in the LAYERobject with the name of the column
in my data, so MapServer knows where to look for the expression. In the
CLASSobject I use EXPRESSION with the value that is actually in the
column for each object that I want to classify.
I'm not sure if it's the same with PostGIS but I don't write the name of
the column again in the CLASSobject.
Just a guess
Kathrin
Hans Castorp wrote:
Hi to all,
I’m trying to filter a postgis layer using the statement EXPRESSION. I
think my configuration is fine but doesn’t works.
Anyone of you detects any trouble on this LAYER statement:
LAYER
CONNECTION "host=localhost dbname=lalin user=??? password=??? port=5432"
DATA "the_geom FROM usos_suelo"
NAME 'USOS SUELO'
GROUP 'USOS SUELO'
TYPE polygon
STATUS ON
TRANSPARENCY 0
CLASSITEM 'clase'
CLASS
NAME 'USOS_ARBORES'
MINSCALE 2500
MAXSCALE 200000
EXPRESSION ('[clase]' = 'ARBORES')
STYLE
ANTIALIAS false
COLOR 162 204 155
END #end style
END # end class
CLASS
NAME 'USOS_CULTIVOS'
MINSCALE 2500
MAXSCALE 200000
EXPRESSION ('[clase]' = 'CULTIVOS')
STYLE
ANTIALIAS false
COLOR 224 224 224
END #end style
END # end class
CLASS
NAME 'USOS_ASENTAMENTOS'
MINSCALE 2500
MAXSCALE 200000
EXPRESSION ('[clase]' = 'ASENTAMENTOS')
STYLE
ANTIALIAS false
COLOR 204 204 204
END #end style
END # end class
END #end layer
Thanks in advance. I think I’m going crazy with this piece of code.
P.S. Of course, I’m sure that ‘clase’ is a column on ‘usos_suelo’
postgis table ;)
Hans Castorp
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