[Mapserver-users] Class Expression help

[Vincent Schut]

Nick,
jsut a guess, but have you tried it with [LEVEL] and [DAY] single quoted too? 
I think you always need to quote your attribute column names.

Regards,
Vincent.

On Thursday 17 July 2003 16:50, Nick Petersen-Bergeron wrote:
> I'm trying to do a class based layer structure for a map program I'm
> writing.  I've looked through all of the syntax examples for expressions
> that I can find, but can't seem to figure out what's wrong.
>
> I have around 20 classes in the layer.  Essentially the only thing that
> will differ between classes is the color.
>
> I've included an example of one of the classes.
>
> CLASS
>                  EXPRESSION "(('[TEMP]' eq 'normal') AND ('[PRECIP]' eq
> 'normal') AND ([LEVEL] eq 0) AND ([DAY] eq 30))"
>                  COLOR 50 50 50
>                  SIZE 5
>                  NAME "normal_city"
>                  SYMBOL "circle"
>                  LABEL
>                          COLOR 50 50 50
>                          FONT arial
>                          SIZE 12
>                          POSITION ur
>                          ANTIALIAS TRUE
>                          TYPE TRUETYPE
>                  END
>          END
>
> Can anyone see a problem with this?
>
> When I comment out a single expression, the shapefile I'm using defaults to
> using that class, so I'm guessing that none of the expressions are
> evaluating to true.  However, the dbf for the shape seems to indicate that
> this should not be the case.  The only error being thrown is the following:
>
>
> Thu Jul 17 10:41:37 2003 - msSearchDiskTree(): Unable to access file.
> Unable to open spatial index for /home/wcs/html/data/countries2.qix. In
> most cases you can safely ignore this message, otherwise check file names
> and permissions.
>
>
> Thanks for your help.
>
> Nick Petersen-Bergeron
> System Administrator
>
> ZedX Inc.
> 369 Rolling Ridge Drive
> Bellefonte, PA. 16823
>
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-- 
______________________________________
Vincent Schut
Sarvision B.V.
Wageningen, The Netherlands
www.sarvision.com