Hi Eric, I appreciate the link to documentation, and have tried to apply the information it contains. The best I can do with it is below. It looks ok, until you start to pan the map, at which point the WMS layer slides right off.
<html> <head> <title>OpenLayers Example</title> <script src='http://dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6.1'></script> <script src="http://openlayers.org/api/OpenLayers.js"></script> </head> <body> <div style="width:80%; height:80%" id="map"></div> <script defer='defer' type='text/javascript'> // Code goes here var options = { projection: new OpenLayers.Projection("EPSG:900913"), units: "m", maxResolution: 156543.0339, maxExtent: new OpenLayers.Bounds(-20037508.34, -20037508.34, 20037508.34, 20037508.34) }; map = new OpenLayers.Map('map', options); // create Virtual Earth layer var vemap = new OpenLayers.Layer.VirtualEarth("Virtual Earth", { sphericalMercator: true, maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34) }); // create WMS layer var wms = new OpenLayers.Layer.WMS( "World Map", "http://labs.metacarta.com/wms/vmap0", {'layers': 'basic', 'transparent': true} ); map.addLayers([vemap, wms]); map.zoomToMaxExtent(); </script> </body> </html> --------------------------------- On Sat, Mar 13, 2010 at 12:07 AM, Eric Lemoine <eric.lemo...@camptocamp.com> wrote: > > On Saturday, March 13, 2010, Roger André <ran...@gmail.com> wrote: > > Hi All,I'm trying to resolve some strange behavior in my OpenLayers map. I > > am using a BING maps base layer, and a GeoJson feature collection layer. > > Both layers display in the map, but the GeoJson layer "acts funny". For > > one thing, it is slightly offset from where it should be located, and for > > another, it doesn't move with the BING base layer when I pan the map. > > I am trying to follow the instructions at > > http://docs.openlayers.org/library/spherical_mercator.html#spherical-mercator, > > which seem to be very well written, but may be slightly out of date? For > > example, the doc says to instantiate a new VirtualEarth layer by doing this: > > > > var layer = new OpenLayers.Layer.VirtualEarth("Virtual Earth", > > { sphericalMercator: true, > > maxExtent: new > > OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34) > > }); > > > > > > But the current examples show using this syntax: > > > > var roads = new OpenLayers.Layer.VirtualEarth("Road Map", > > { type: VEMapStyle.Shaded, > > numZoomLevels: 21 } > > ); > > > > > > In any case, I can't seem to figure out how to apply the projection > > instructions that are on the doc. Also, I'm not sure if a projection > > mismatch is causing the problem I'm seeing, but I figure it's a place to > > start. > > > > Would appreciate some advice regarding how to troubleshoot this. > > Hi > > <http://trac.openlayers.org/wiki/FrequentlyAskedQuestions#WhydontmyvectorfeaturesworkoverGoogleYahooVirtualEarthetc.> > > (this a link to the old FAQ, as the new one is currently out of order.) > > You should use the EPSG:900913 projection in your map and set > "sphericalMercator" to true in your VirtualEarch layer. See the > spherical-mercator.html example. Also, the vector data (GeoJSON) > should be in EPSG:900913, unless you reproject it client side. If you > use either the fixed or BBOX strategy set "projection" to the your > data projection (e.g. new OpenLayers.Projection("EPSG:4326")) in the > layer to havr OpenLayers reproject the data to the map projection > before adding it to the layer. > > Cheers, > > -- > Eric Lemoine > > Camptocamp France SAS > Savoie Technolac, BP 352 > 73377 Le Bourget du Lac, Cedex > > Tel : 00 33 4 79 44 44 96 > Mail : eric.lemo...@camptocamp.com > http://www.camptocamp.com _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users