I have an Ordnance Survey transformation class, for those that do not wish to use proj4js.
It is available for download at http://ge.pythonmoo.co.uk/maps/OpenLayers.Projection.OrdnanceSurvey.js Please _do not_ hotlink to it. goliah wrote: > > Hi Arnd. > thank you for your response. > > No, i didn't include proj4js in my page. > Now I've tried to include it in my html page (and include all the > definitions), but it still does not work. > > Any other ideas? > Thank you! > > Mauro > > > > > > 2009/1/13 Arnd Wippermann <[email protected]>: >> The code is correct.Have you included proj4js in your page? >> >> Otherwise >> Transform depends on the proj4js library. >> If proj4js is not available, then this is just an empty stub. >> >> >> Arnd Wippermannn >> >> >> >> -----Ursprüngliche Nachricht----- >> Von: [email protected] [mailto:[email protected]] >> Im >> Auftrag von Mauro Bianchi >> Gesendet: Dienstag, 13. Januar 2009 11:51 >> An: [email protected] >> Betreff: [OpenLayers-Users] Google and UK grid vector overlay >> >> Dear all, >> I'm pretty new to OL and I want to do the following >> >> 1) have a google layer as a base layer >> 2) overlay a vector layer and add points programmatically. Points >> coordinates are given in the UK national grid system (OSGB , which should >> be >> EPSG:27700) >> >> I could convert points coordinates externally, but I'd prefer to do it >> directly into OpenLayers, if possibile. >> I tried different methods but cannot get it working. >> Any help would be really appreciated! >> >> Thank you >> Mauro >> >> >> My code is the following >> >> >> var map; >> >> var options = { >> projection: new OpenLayers.Projection("EPSG:900913"), >> displayProjection: new OpenLayers.Projection("EPSG:4326"), >> units: "m", >> numZoomLevels: 18, >> maxResolution: 156543.0339, >> maxExtent: new OpenLayers.Bounds(-20037508, -20037508, >> >> 20037508, 20037508.34) >> }; >> >> map = new OpenLayers.Map('map', options); >> >> //google maps layer, physical >> var gphy = new OpenLayers.Layer.Google( >> "Google Physical", >> {type: G_PHYSICAL_MAP, numZoomLevels: 20, >> 'sphericalMercator':true} >> ); >> >> map.addLayers([gphy]); >> >> >> //a vector layer where i want to add points programmatically var >> vectorLayer >> = new OpenLayers.Layer.Vector("My Geometry"); >> >> //this is a point that i want to add in UK grid coordinates var point = >> new >> OpenLayers.Geometry.Point(519000, 165222).transform( new >> OpenLayers.Projection("EPSG:27700"), map.projection); var pointFeature = >> new >> OpenLayers.Feature.Vector(point); >> >> vectorLayer.addFeatures([pointFeature]); >> >> map.addLayer(vectorLayer); >> >> //controls and centering >> map.addControl(new OpenLayers.Control.LayerSwitcher()); >> map.setCenter(new >> OpenLayers.LonLat(-0.126343,51.539502).transform(map.displayProjection, >> map.projection), 10); >> >> >> >> >> -- >> Mauro Bianchi >> [email protected] >> _______________________________________________ >> Users mailing list >> [email protected] >> http://openlayers.org/mailman/listinfo/users >> >> > > > > -- > Mauro Bianchi > [email protected] > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users > > -- View this message in context: http://n2.nabble.com/Google-and-UK-grid-vector-overlay-tp2150605p2157235.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
