That's awesome! Mano Marks Geo Developer Advocate http://twitter.com/ManoMarks
2009/10/25 Klokan Petr Přidal <[email protected]>: > Hi everybody, > > on Saturday during the Code Sprint of the FOSS4G 2009 conference in > Sydney we have made quite interesting step forward in the web > cartography. > With the help of other open-source developers I put together a > prototype of the client-side map reprojection implemented only in > JavaScript (using HTML5 Canvas tag and the Proj4js JavaScript > library). > > An image as JPEG, PNG or GIF is with JavaScript in a web-browser > warped into a different map projection. > The example is reprojecting the world image into the Spherical > Mercator (map projection of Google Maps), into the map projection used > in US National Atlas, into Canada LCC and into the Mollweide > projection (used by National Geographic for thematic mapping). > > To try it you need any web browser which supports HTML5, it means the > latest version of Firefox, Chrome, Safari or Opera. > > Have a look at the demo: > http://examples.maptiler.org/map-reprojection-html5-canvas/ > > It is just a prove of concept in this moment, but I am sure practical > applications will follow. > > The most typical use could be the client-side warping of raster data > (weather forecast, ..) into the correct image overlay of Google Maps > and similar online maps. > Any WMS sever providing only EPSG:4326 can now correctly overlay > Google Maps, if somebody use this technique to prepare the mash-up. Of > course the speed can be an issue in this moment, but there is plenty > of space for improvement in the warping code, and it can be done in a > separate computing thread, which is possible with HTML5 Web Workers... > > Best, > > Klokan Petr Pridal > -- > http://blog.klokan.cz/ > http://www.maptiler.org/ > http://www.oldmapsonline.org/ > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
