[OpenLayers-Dev] Projecting images with HTML5 Canvas in the web-browser

Tim Schaub tschaub at opengeo.org
Mon Oct 26 19:13:19 EDT 2009


Hey-

Klokan Petr Přidal wrote:
> 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/
> 

That is cool!

> 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


-- 
Tim Schaub
OpenGeo - http://opengeo.org
Expert service straight from the developers.



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