What HTML5 Canvas based Mapping libraries exist?

The Bing Maps and Google Maps JavaScript/Ajax Mapping Controls/Libraries use <img/> tags for rending map tiles and such.

Are there any mapping controls/libraries available that utilize the开发者_开发技巧 HTML5 Canvas element for rendering the map tiles?

A more modern control would be nice, especially since it'll utilize hardware acceleration in the new browsers for rendering the map display.

My current favourite Javascript Maps API is Leaflet (http://leaflet.cloudmade.com). It's still only a very young control (first public release was a few months ago) and it's got a few bugs to be ironed out but it's got a lovely clean, lightweight API.

Best of all, all the map objects are designed to be easily extendable so, starting from the abstract ILayer interface, you can...:

• create regular tile layers that load images referenced by tile x/y/z coordinates (http://leaflet.cloudmade.com/reference.html#tilelayer)
• create tile layers that load data from a WMS server (http://leaflet.cloudmade.com/reference.html#tilelayer-wms)
• (and this is the specific answer to your question), create tile layers that are drawn using canvas elements on the client side (http://leaflet.cloudmade.com/reference.html#tilelayer-canvas)

And because it's open source, you can (unlike Bing or Google controls) extend these tile layers still further if you desire....

OpenLayers3 will offer WebGL, Canvas and DOM rendering support, in addition an extensive set of "connectors" for tile providers, OGC compliant servers, and support for vector features.