[Qgis-user] MINSCALE, MAXSCALE WMS

[Jürgen E. Fischer]

Moin Sylvia,

On Tue, 20. Nov 2012 at 11:12:58 +0100, Sylvia Preuß wrote:
>    in my webmapservice (WMS *.map) I have set MINSCALEDENOM 5000 and
>    MAXSCALEDENOM 50000 in the layer section. Now I added this WMS-layer in
>    qgis and the range is 1:6666 til 1:66666 instead of 1:5000 til 1:50000. I
>    testet other WMS-services and it's always a similar behavior. It's not
>    always times 1,33333. but close. Has anybody experienced the same or knows
>    a way out?

The scale you see in QGIS is the scale on screen based on the display's
resolution.  The scale the WMS calculates is based on a different fixed
"artificial" resolution.   Therefore the scale QGIS shows is not the
scale the WMS calculates when figuring out what to render.

As neither the scale nor the resolution are specified in the WMS request,
there's not much we can do.   QGIS server was extended to support a
non-standard DPI parameter to solve that.

See also: http://hub.qgis.org/issues/6430


Jürgen 

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