[mapserver-users] One layer filled with 3 colors

[Emilio Ponce]

This code takes me now to a new one question:

Is there a way to assign colours dynamically? I'm wondering  if
mapserver is able to detect the different options of the column
'zona', and then use random palette colours to represent these
automatically, without having to set COLOR for each one manually. It
can be useful because every column has different options.

Thank you guys,



2008/4/22 Emilio Ponce <yosoycore at gmail.com>:
> Thanks Stephen!
>  I've found the solution with your idea, is very similar to your code:
>
>
>         LAYER
>
>         ...
>
>                 DATA "the_geom from car_marccata"
>                 CLASSITEM "zona"
>
>                 CLASS
>                         EXPRESSION "FORA"
>
>                         COLOR 143 81 8
>                 END
>
>                 CLASS
>                         EXPRESSION "MAR"
>
>                         COLOR 0 154 239
>                 END
>
>                 CLASS
>                         EXPRESSION "CATA"
>
>                         COLOR 223 223 223
>                 END
>
>         END
>
>
>  Regards,
>
>
>  2008/4/22 Stephen Woodbridge <woodbri at swoodbridge.com>:
>
>
> >
>  > Emilio Ponce wrote:
>  >
>  > > Hi everyone,
>  > >
>  > > I'm trying to paint one layer with 3 different colors, depending on
>  > > one field called 'zona' that is a column of the table stored at a
>  > > postGIS database. I'm doing this in the layer:
>  > >
>  > >                ...
>  > >                STATUS DEFAULT
>  > >                CONNECTIONTYPE postgis
>  > >                CONNECTION "host=**** dbname=**** user=**** password=****
>  > port=****'"
>  > >                DATA "the_geom from car_marccata"
>  > >
>  > >                FILTER "zona='FORA'"
>  > >                CLASS
>  > >                        COLOR 143 81 8
>  > >                END
>  > >
>  > >                FILTER "zona='MAR'"
>  > >                CLASS
>  > >                        COLOR 0 154 239
>  > >                END
>  > >
>  > >                FILTER "zona='CATA'"
>  > >                CLASS
>  > >                        COLOR 223 223 223
>  > >                END
>  > >
>  > > It doesn't works.. I've tried different strategies but I haven't found
>  > > the problem yet. Does anyone knows what's wrong?
>  > >
>  > > Thanks!
>  > >
>  > >
>  >
>  >  Try this:
>  >
>  >                 STATUS DEFAULT
>  >                 CONNECTIONTYPE postgis
>  >                 CONNECTION "host=**** dbname=**** user=**** assword=****
>  > port=****'"
>  >
>  >                 DATA "the_geom from car_marccata"
>  >                 CLASSITEM "zona"
>  >
>  >                 CLASS
>  >                         EXPRESSION ([zona] = 'FORA')
>  >
>  >                         COLOR 143 81 8
>  >                 END
>  >
>  >                 CLASS
>  >                         EXPRESSION ([zona] = 'MAR')
>  >
>  >                         COLOR 0 154 239
>  >                 END
>  >
>  >                 CLASS
>  >                         EXPRESSION ([zona] = 'CATA')
>  >
>  >
>  >                         COLOR 223 223 223
>  >                 END
>  >
>
>
>
>  --
>  Emilio
>



-- 
Emilio