The bit that I am missing is the exact projection specification I need to get WGS84 data onto a Google layer. I think these are all the relevant bits of code
************* var map = new OpenLayers.Map('map'); var gphy = new OpenLayers.Layer.Google( "Google Physical", {type: G_PHYSICAL_MAP} ); map.addLayer(gphy); ************* othermarkers = new OpenLayers.Layer.Vector("Other sites",{strategies: [new OpenLayers.Strategy.Cluster()], projection : new OpenLayers.Projection("EPSG:4326"), styleMap: myStyleMap } ); map.addLayer(othermarkers); ******************** (this is in a loop) point = new OpenLayers.Geometry.Point(siteInfo.long, siteInfo.lat); spot = new OpenLayers.Feature.Vector(point,siteInfo); featureGroup.push(spot); ****************** othermarkers.addFeatures(featureGroup); **************** I've tried setting the Vector layer to 900913 and without any projection but I can't see any difference, the features still get further away from their correct spots the further down the screen I move them. If I move the map up they get closer to where they should be. :-? ~Craig >>> "Jan H. van der Ven" 03/20/09 9:05 AM >>> Dear Craig, I have started a projection doc page here: http://trac.openlayers.org/wiki/Documentation/Dev/proj4js. If that does not help, please tell me what is missing. Kind regards, Jan Craig Stanton schreef: > Hi All, > I've sorted the clustering strategy that Ivan mentioned a few days ago > but have come upon another problem I'd appreciate some advice on. My data is > stored as WGS84 lat/longs and I want to use Google Terrain as the base layer, > but the points drift off their locations as they get closer to the bottom of > the map window. I know the problem is in the projections I'm using but I > can't figure out the right combination of 900913, 4326, WGS84 etc etc. Could > someone please explain what I should do to the vector layer on which my > points are plotted and to the Google layer I am using as my base. > > Cheers, > Craig > NIWA is the trading name of the National Institute of Water & Atmospheric > Research Ltd. > _______________________________________________ > Users mailing list > Users@openlayers.org > http://openlayers.org/mailman/listinfo/users > > ------------------------------------------------------------------------ > > > Geen virus gevonden in het binnenkomende-bericht. > Gecontroleerd door AVG - www.avg.com > Versie: 8.0.238 / Virusdatabase: 270.11.19/2010 - datum van uitgifte: > 03/18/09 20:27:00 > > NIWA is the trading name of the National Institute of Water & Atmospheric Research Ltd. _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users