[mapserver-users] How to use MINSCALEDENOM & MAXSCALEDENOM with dynamic image size?

[Tamas Szekeres]

John,

I guess it might be the same problem that I've already addressed in
http://trac.osgeo.org/mapserver/ticket/2738

The related changes have already been applied in the development version
(SVN trunk) so you can test it.

Best regards,

Tamas


2008/12/9 John Maurer <maurerj at nsidc.org>

> Dear MapServer Users,
> Defining a minimum and maximum scale denominator for a layer seems
> problematic to me when the resulting image size can be arbitrarily specified
> by the end user. For instance, doubling the image size (e.g. 400px to 800px)
> on the same map will double the scale denominator (e.g. 24,000 to 48,000)--a
> layer may display at one image size but not the other because of this. A
> more useful criteria would be to specify the minimum and maximum pixel size
> for a layer (e.g. 1 km and 5 km), which is independent of the image size.
> This must be a common problem for MapServer application developers since a
> WMS call requires an image width and height. Has anyone come up with a
> workaround for this? Or am I understanding things incorrectly? Thanks for
> any help!
> Best Regards,
>
> --
> John Maurer
> Web/Database Applications Engineer
> National Snow and Ice Data Center (NSIDC)
> University of Colorado at Boulder
> http://cires.colorado.edu/~maurerj <http://cires.colorado.edu/%7Emaurerj>
> +1-303-586-1677
> ------------------------------------
> "Without geography, you're nowhere!"
>
>
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