On Fri, Aug 31, 2007 at 08:18:50PM -0000, OpenLayers wrote: > #686: Treat Google Layer as projected data
> I don't know how much testing we want to do on this, but I'm tapped out on > it: for now, marking review just to garner comments from anyone interested > in the code. This is just a diff between > http://dev.openlayers.org/sandbox/tschaub/google/ and trunk -- The code > can be checked out from: > > http://svn.openlayers.org/sandbox/tschaub/google/ > > and the way you use it is to set: > > sphericalMercator: true > > as an option on the layer. > > I think this is going to be the final API: the GoogleMercator layer is > going to go away, and it's just going to be an option on the layer. Essentially, this is probably now API complete: * You create your map with a maxExtent in spherical-mercator projected meters. * You add a Commercial base layer to that map with the 'sphericalMercator': true option set. * You add overlays to that map. This means that your overlays must support EPSG:900913 (or you can override it after creating your layer if they support it via some other number) -- the proj4/WKT is in the SphericalMercator.js file (which will also show in the docs once this is in trunk). The canonical example is: http://dev.openlayers.org/sandbox/tschaub/google/examples/spherical-mercator.html Tim's put together a number of different layers here, demonstrating the functionality of the layer with a TileCache-powered WMS overlay, to demonstrate that yes, Virginia, there really is a Google layer you can lay TileCache down on top of. Now is the time for API complaints -- and also the time for tests, if you want to write them. Things which could use testing: * In the test_SphericalMercator.html file, add functions for initialization of each: * Google * VirtualEarth * Yahoo and ensure that: * If sphericalMercator is set, they have inverse/forward proj functions * RESOLUTIONS is set to appropriate values if sphericalMercator is set * If sphericalMercator is not set, those layers dont have the inverse/forward projection functions * if sphericalMercator is not set, units aren't touched * Create a test in SphericalMercator.html for checking tha initMercatorParameters sets the proper units, and resolutions based on MIN_ZOOM_LEVEL and MAX_ZOOM_LEVEL. If you've got a sandbox account, feel free to commit tests directly into the sandbox. Questions? Comments? Complaints? Regards, -- Christopher Schmidt MetaCarta _______________________________________________ Dev mailing list [email protected] http://openlayers.org/mailman/listinfo/dev
