[Qgis-user] Scale dependent visibility

[Heikki Luhamaa]

Hi,

this thing I know and works perfectly well for me. But, I need to apply these visibility settings to several dozens of raster files at once. And doing this one-by-one is quite time consuming. So, it would be nice to have option to apply these setting to a bunch of files at once. For example by right mouse-click on group tab and then selection group properties and scale dependent visibility for whole group (dreaming...)? But maybe there is some kind of work-around to achieve this. I am not familiar with python (nor programming) but is it possible to implement this kind of behaviour through plug-in?

Heikki

On Mon, 15 Mar 2010 09:22:32 +0100 (CET)
"Andreas Neumann" <a.neumann at carto.net> wrote:

> Hi Heikki,
> 
> For every data layer you can set the scale-dependent rendering with
> min/max values.
> 
> Go to layer properties --> General --> Use Scale Dependent Rendering -->
> set min/max values.
> 
> For correct scale calculations it is important that you correctly set the
> map units and projection parameters.
> 
> Unfortunately, a data layer can only have one scale range, if you want to
> display the same layer with different filter and symbolization settings
> you have to load the layer several times.
> 
> Alternatively, you can use a WMS server to serve your raster data and use
> the scale-range settings of your mapserver. This way your users only have
> to load one layer and the server deals with the scale settings.
> 
> Hope this helps,
> Andreas
> 
> On Mon, March 15, 2010 7:28 am, Heikki Luhamaa wrote:
> > Hi all,
> >
> > is there somehow possible to apply "Scale dependent visibility" option on
> > several raster layers or to the whole project at once? I have several
> > projects where I need to have open several dozens or more raster layers.
> > Despite qgis renders rasters quite quickly it would probably speed up
> > things if I can hide them, at certain zoom level.
> >
> > Thanks,
> > Heikki Luhamaa
> > _______________________________________________
> > Qgis-user mailing list
> > Qgis-user at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/qgis-user
> >
> 
> 
> -- 
> Andreas Neumann
> http://www.carto.net/neumann/
> http://www.svgopen.org/
> 


-- 
Heikki Luhamaa <heikkiluha at hot.ee>