[Qgis-psc] Fw: qgis web migration to osgeo

[Otto Dassau]

Thanks Niccolo and Paolo! 

I forward this to Stephan Reber and will add it to the wiki as soon as
possible, so we don't miss it when we migrate the user map.

regards,
 Otto

On Mon, 09 Jun 2008 16:33:54 +0200
Paolo Cavallini <cavallini at faunalia.it> wrote:

> Otto Dassau ha scritto:
> > Hi, 
> > 
> > I was on the "LinuxTag" Conference in Berlin the last days (also hold a 1h
talk
> > about QGIS :-)). I had a chance to talk to german OSM project members
(Frederik
> > Ramm and Jochen Topf). They don't intend to provide WMS services for free,
> > because it would cause too much traffic on their servers, as they said, so
they
> > will offer WMS access for money via their company geofabrik.de.
> > 
> > Not interesting for us, I think, although it would be the easiest way to
> > include the data. Anyway, I talked to other people as well and I am sure we
> > find a solution for a nice usermap with OSM data, without paying for direct
WMS
> > access at the OSM project.
> 
> A possible use (thanks to Niccolo Rigacci):
>      <title>OpenStreetMap</title>
> 
>      <!-- bring in the OpenLayers javascript library -->
>      <!-- see: 
>
http://dev.openlayers.org/releases/OpenLayers-2.6/doc/apidocs/files/OpenLayers-js.html

> -->
>      <script src="http://openlayers.org/api/OpenLayers.js"></script>
> 
>      <!-- bring in the OpenStreetMap OpenLayers layers. -->
>      <script 
> src="http://openstreetmap.org/openlayers/OpenStreetMap.js"></script>
> 
>      <script type="text/javascript">
> 
>          // JavaScript function to change overlay opacity.
>          var map = null;
>          var layerStrade = null;
>          var maxOpacity = 0.9;
>          var minOpacity = 0.1;
>          function changeOpacity(byOpacity) {
>              var newOpacity = 
> (parseFloat(OpenLayers.Util.getElement('opacity').value) + 
> byOpacity).toFixed(1);
>              newOpacity = Math.min(maxOpacity,
>                                    Math.max(minOpacity, newOpacity));
>              OpenLayers.Util.getElement('opacity').value = newOpacity;
>              layerStrade.setOpacity(newOpacity);
>          }
> 
>          // Start position for the map.
>          var lat=43.820735626
>          var lon=11.132031754
>          var zoom=15
> 
>          var map; //complex object of type OpenLayers.Map
> 
>          //Initialise the 'map' object
>          function init() {
> 
>              map = new OpenLayers.Map ("map", {
>                  controls:[
>                      new OpenLayers.Control.Navigation(),
>                      new OpenLayers.Control.PanZoomBar(),
> 		    new OpenLayers.Control.MousePosition(),
>                      new OpenLayers.Control.Attribution(),
> 		    new OpenLayers.Control.Permalink(),
> 		    new OpenLayers.Control.Scale(),
> 		    // Currently there is a bug in the ScaleLine control :-(
> 		    //new OpenLayers.Control.ScaleLine(),
> 		    new OpenLayers.Control.LayerSwitcher() ],
> 		// See http://trac.openlayers.org/wiki/SphericalMercator
> 		projection: new OpenLayers.Projection("EPSG:900913"),
> 		units: "meters",
> 		maxResolution: 156543.0339,
> 		maxExtent: new OpenLayers.Bounds(-20037508.34, -20037508.34, 
> 20037508.34, 20037508.34),
> 		displayProjection: new OpenLayers.Projection("EPSG:4326"),
> 		numZoomLevels: 18
> 	    });
> 
>              // Define the base map layers
>              layerMapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik");
>              layerOsmarender = new 
> OpenLayers.Layer.OSM.Osmarender("Osmarender");
> 
>              // Define the overlay.
>              layerStrade = new OpenLayers.Layer.MapServer("Strade",
> 		"/cgi-bin/mapserv?map=/var/www/maps/openlayers.map",
> 		{format: 'image/png'},
> 		{isBaseLayer: false, opacity:0.6, transparent:true}
> 	    );
> 
>              map.addLayer(layerMapnik);
>              map.addLayer(layerOsmarender);
>              map.addLayer(layerStrade);
> 
>              var lonLat = new OpenLayers.LonLat(lon, lat).transform(new 
> OpenLayers.Projection("EPSG:4326"), new 
> OpenLayers.Projection("EPSG:900913"));
>              map.setCenter (lonLat, zoom);
>          }
> 
>      </script>
>