Proof of concept of grayscale image recolored directly via D3js color scale. Wikimaps colors used.
Source: The source image is a global heightmap from the Shuttle Radar Topography Mission, released as part of NASA’s Blue Marble collection at 8km resolution. The topography data is stored in a simple 130KB black&white, 8-bit PNG. In it, darker values represent lower elevations (sea floor), lighter values represent higher elevations (mountains).
Colors are read out of the image using the Canvas API.
[0,255]: there are 8 bits per channel, values range thus is
0: the [deepest depression below sea level](http://en.wikipedia.org/wiki/List_of_plac