cfpb/mapusaurus — pull request #85 by cmc333333 (2014-08-11 21:23:45+00:00)
Title: Add background images, a simple key to map export

Steps through each image of the background tiles, drawing them to the canvas (some deferred action is required due to cross-origin issues). Then, draw the svg as before. Then, draw the key and add some strings to indicate the value of the selectors. Finally, open the drawn image in a separate tab.

We'll eventually want the proper font size, etc. but this is a working prototype.