On Wed, May 07, 2008 at 04:08:40PM +0200, jrom wrote: > Hi, > > I am trying to reproject lat/lon vector ontop of commercial api using > OpenLayers. > I've spent quite a lot of time on a strange behaviour. My vector does > not appear on the map when i switch on sphericalMercator to true... > > The problem is that the point does not appear at all on the map. > However, when i switch sphericalMercator to false, it appears (but not > on the right place at large scale due to projection difference) > > I really don't understand what i am doing wrong. I've check the > projected coordinates and they are correct... > > Did someone experience such an issue ?
The layer is being turned off because it is 'out of range'. The reason for this is that you have not defined the spherical mercator projection propertpies on the map: this means that the overlay is pulling the defaults from the map (which are in lon/lat) and therefore has a resolutions range of 1.40625 -> some very small number, while your spherical mercator layer has a range of 150000ish -> 100ish, and the end result is that your layer is never on. Copy the options from the map creation in the spherical-mercator.html example, and add them to your map constructor, and your layer should appear. -- Chris > Regards > > ps: Here is the code > > <html> > <head> > <title>OpenLayers Example</title> > <script > src='http://dev.virtualearth.net/mapcontrol/v3/mapcontrol.js'></script> > <script src="http://openlayers.org/api/OpenLayers.js";></script> > </head> > <body> > <div style="width:100%; height:100%" id="map"></div> > <script defer='defer' type='text/javascript'> > var map = new OpenLayers.Map("map", { > projection: new OpenLayers.Projection("EPSG:900913"), > displayProjection: new OpenLayers.Projection("EPSG:4326") > }); > map.addControl(new OpenLayers.Control.Permalink()); > map.addControl(new OpenLayers.Control.MousePosition()); > var layer = new OpenLayers.Layer.Google("Google", > { sphericalMercator: true }); > map.addLayer(layer); > map.zoomToMaxExtent(); > > var wkt = new OpenLayers.Format.WKT(); > var features = wkt.read("POINT(-71, 42)"); > var myVector = new OpenLayers.Layer.Vector("GML", > {projection: new OpenLayers.Projection("EPSG:900913")}); > myVector.addFeatures(features); > map.addLayer(myVector); > map.zoomToExtent(myVector.getExtent()); > </script> > </body> > </html> > > For your information i'm using firefox 2.0.0.14 (inux and windows) and > Safari (Leopard). Same problems on each platforms > > -- > jrom. > http://www.ombresetlumieres.com > > > > -- > jrom. > http://www.ombresetlumieres.com > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users -- Christopher Schmidt MetaCarta _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
