[mapserver-users] getting the scale in a map file at runtime

[Richard Greenwood]

On Fri, Jun 3, 2022 at 8:43 AM Jörg Thomsen (WhereGroup) <
joerg.thomsen at wheregroup.com> wrote:

> Richard,
> sorry, yes, sure...
>
> Perhaps you can use scaletoken? It's not the same as you are searching
> for, but you could define a set of tolerance-values for different scales.
>

Yes - I had not thought of that. It might be a better way than what I was
trying to do. Thank you!


Am 03.06.22 um 16:21 schrieb Richard Greenwood:
> >
> >
> > On Fri, Jun 3, 2022 at 8:00 AM Jörg Thomsen (WhereGroup)
> > <joerg.thomsen at wheregroup.com <mailto:joerg.thomsen at wheregroup.com>>
> wrote:
> >
> >     Hi,
> >
> >     what about:
> >     https://mapserver.org/mapfile/template.html#image-geometry
> >     <https://mapserver.org/mapfile/template.html#image-geometry>
> >     -> scaledenom
> >
> >     Doesn't work?
> >
> >
> > Thanks, but no, it does not work. I'm trying to access the scale in a
> > map file, not in a template. Using square brackets [variable] is
> > interpreted as a field name in the data, not as a runtime variable. For
> > example:
> >    CLASS
> >      STYLE
> >        GEOMTRANSFORM (generalize([shape], [scaledenom]))
> >        COLOR "#2AB1F7"
> >      END
> >    END
> > returns the error:
> > DBASE file error. Item 'scaledenom' not found.
> >
> >
> >     Jörg
> >
> >
> >     Am 03.06.22 um 15:45 schrieb Richard Greenwood:
> >      > Can I get the current scale for use in a map file at runtime.
> >      > Specifically, I'd like to use it in a geotransform something like:
> >      >     GEOMTRANSFORM (generalize([shape], [scale]))
> >      > or more likely for use in an expression:
> >      >     GEOMTRANSFORM (generalize([shape], [scale] / 100))
> >      > Thanks
> >      > --
> >      > Richard W. Greenwood
> >      > www.greenwoodmap.com <http://www.greenwoodmap.com>
> >     <http://www.greenwoodmap.com <http://www.greenwoodmap.com>>
> >      >
> >      > _______________________________________________
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> >
> >
> >     --
> >     Viele Grüße,
> >     Jörg Thomsen
> >
> >     ---------------------------------------------
> >     Aufwind durch Wissen!
> >     Jetzt neu: Web-Seminare und Online-Schulungen
> >     bei der www.foss-academy.com <http://www.foss-academy.com>
> >     ---------------------------------------------
> >
> >     Jörg Thomsen
> >     WhereGroup GmbH
> >     Bundesallee 23
> >     10717 Berlin
> >     Germany
> >
> >     Tel: +49 (0)30 / 5130 278 74
> >     Fax: +49 (0)30 / 5130 278 11
> >
> >     joerg.thomsen at wheregroup.com <mailto:joerg.thomsen at wheregroup.com>
> >     www.wheregroup.com <http://www.wheregroup.com>
> >
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> >     Olaf Knopp, Peter Stamm
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> >
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> MapServer-users at lists.osgeo.org>
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> >
> >
> >
> > --
> > Richard W. Greenwood
> > www.greenwoodmap.com <http://www.greenwoodmap.com>
>
>
> --
> Viele Grüße,
> Jörg Thomsen
>
> ---------------------------------------------
> Aufwind durch Wissen!
> Jetzt neu: Web-Seminare und Online-Schulungen
> bei der www.foss-academy.com
> ---------------------------------------------
>
> Jörg Thomsen
> WhereGroup GmbH
> Bundesallee 23
> 10717 Berlin
> Germany
>
> Tel: +49 (0)30 / 5130 278 74
> Fax: +49 (0)30 / 5130 278 11
>
> joerg.thomsen at wheregroup.com
> www.wheregroup.com
>
> Geschäftsführer:
> Olaf Knopp, Peter Stamm
> Amtsgericht Bonn, HRB 9885
>
> -------------------------------
> Folgen Sie der WhereGroup auf twitter: http://twitter.com/WhereGroup_com
>


-- 
Richard W. Greenwood
www.greenwoodmap.com
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