[Tilecache] Quick panning with overlays

[Yves Moisan]

Yep.  I just found it.  I can lump 5 or 6 small line shapefiles into one
WMS layer, but the problem now is the layerswitcher.

Thanx,

Yves

Le mercredi 26 novembre 2008 à 13:49 -0500, Alexandre Dube a écrit :
> Yves,
> 
> You can "group" your layers directly in OpenLayers without to do 
> anything in your mapfile.
> 
> See below for an example :
> - Layer.MapServer layers names must separated by spaces " "
> - Layer.WMS layers names must be separated by comma ","
> 
> Hope this helps,
> 
> Alexandre
> 
> olBDGA = new OpenLayers.Layer.MapServer(
> "BDGA map",
> szMSURL,
> {
> map: szBDGAMapPath,
> layers: "BDGA_HABIT_S_POLY BDGA_MRC_S_POLY_1M "+
> "BDGA_REGIO_S_POLY_1M "+
> "BDGA_ROUTE_L_ARC BDGA_ROUTE_L_ARC_ANNO "+
> "BDGA_HABIT_P_POINT",
> map_imagetype: "aggtrans"
> },
> {
> isBaseLayer: false,
> singleTile: true
> }
> )
> 
> 
> 
> Yves Moisan wrote:
> >> I think 20 overlays is .. a lot.  especially from a dynamic WMS - must
> >> take a while to render, forget panning!  Instead of grouping them in
> >> OpenLayers (which would still mean 20 OL layers), can you group them
> >> in the WMS -- that helps with things like labeling as well..
> >>     
> >
> > Hey Josh,
> >
> > Indeed I have 20 some odd overlays and 3 base layers.  Those 3 layers
> > are Google hybrid, a blank 1 X 1 gif to act as no base layer and an
> > Ikonos image which I've massaged with gdal as per
> > http://ms.gis.umn.edu/docs/howto/raster_data ch. 10 and which I
> > eventually used TC on mod_python for.  None of the overlays are
> > Tilecached because they're a bunch of very small shapefiles.  Grouping
> > in the WMS means that I need to tweak my mapfile right ?  I tried
> > looking for examples on the MapServer site and didn't find anything.  Or
> > is that grouping done elsewhere ?
> >
> >   
> >> As for caching, I assume something like TileCache was meant.  I think
> >> I actually saw a patch to tilecache recently that lets you do a form
> >> of 'cascaded wms' (eg merging of wms layers) in tilecache itself for
> >> that matter...
> >>     
> >
> > I guess that applies for TileCached layers only, which isn't my case.
> >
> > Thanx !
> >
> > Yves
> >
> > _______________________________________________
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> > Tilecache at openlayers.org
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> >   
> 
>