Leaflet/Leaflet — pull request #2621 by bennlich (2014-04-09 22:54:17+00:00)
Title: Allow access to L.TileLayer imagedata

See https://developer.mozilla.org/en-US/docs/HTML/CORS_Enabled_Image. Seemed like such a small change it could maybe go in core instead of writing an entire plugin for it, but I also doubt it's a common use case. I use this to pull in data that's stored in tiles (e.g. elevation data, soil composition).