[mapserver-users] Google tile schema to coordinates conversion
Hi all I would like to set up a scripting solution based on MapScript that replies correctly to requests using the Google tile schema x+y+z. Does anybody know a formula how to transform the XYZ request values to bounding box coordinates in the Google Spherical Mercator projection? I know that Mapserver CGI offers the tile mode for this. It works very well, but I would need a Mapscript solution for more flexibility of the request handling. Any hint appreciated Armin ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Google tile schema to coordinates conversion
I discovered now the conversion method in the Mapserver source code in maptile.c => msTileSetExtent(). armin On 10/06/2011 17:43, Armin Burger wrote: Hi all I would like to set up a scripting solution based on MapScript that replies correctly to requests using the Google tile schema x+y+z. Does anybody know a formula how to transform the XYZ request values to bounding box coordinates in the Google Spherical Mercator projection? I know that Mapserver CGI offers the tile mode for this. It works very well, but I would need a Mapscript solution for more flexibility of the request handling. Any hint appreciated Armin ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Google tile schema to coordinates conversion
there is also code here http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/ On Fri, Jun 10, 2011 at 3:35 PM, Armin Burger wrote: > I discovered now the conversion method in the Mapserver source code in > maptile.c => msTileSetExtent(). > > armin > > > On 10/06/2011 17:43, Armin Burger wrote: >> >> Hi all >> >> I would like to set up a scripting solution based on MapScript that >> replies correctly to requests using the Google tile schema x+y+z. Does >> anybody know a formula how to transform the XYZ request values to >> bounding box coordinates in the Google Spherical Mercator projection? >> >> I know that Mapserver CGI offers the tile mode for this. It works very >> well, but I would need a Mapscript solution for more flexibility of the >> request handling. >> >> Any hint appreciated >> >> Armin >> ___ >> mapserver-users mailing list >> mapserver-users@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/mapserver-users >> > ___ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Google tile schema to coordinates conversion
On Fri, Jun 10, 2011 at 05:43:27PM +0200, Armin Burger wrote: > > I would like to set up a scripting solution based on MapScript that > replies correctly to requests using the Google tile schema x+y+z. > Does anybody know a formula how to transform the XYZ request values > to bounding box coordinates in the Google Spherical Mercator > projection? Just for the curious: the Bing map uses Quadkeys into the URL instead of x+y+z, here you can find the math beyond that: http://msdn.microsoft.com/en-us/library/bb259689.aspx -- Niccolo Rigacci Firenze - Italy Tel. ufficio: 055-0118525 ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Google tile schema to coordinates conversion
On 6/11/2011 8:36 AM, Niccolo Rigacci wrote: On Fri, Jun 10, 2011 at 05:43:27PM +0200, Armin Burger wrote: I would like to set up a scripting solution based on MapScript that replies correctly to requests using the Google tile schema x+y+z. Does anybody know a formula how to transform the XYZ request values to bounding box coordinates in the Google Spherical Mercator projection? Just for the curious: the Bing map uses Quadkeys into the URL instead of x+y+z, here you can find the math beyond that: http://msdn.microsoft.com/en-us/library/bb259689.aspx You might also want to look at mod_geocache as if supports all common tiling schemes off of a single tilecache. It also has a demo mode that will generate a sample OpenLayers page(s) to demo setup and access to the cache using each tiling scheme. -Steve W ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
