It's a little buried, but the API for drawing a line on the map in Atlas is documented here: https://github.com/aaronpk/Static-Maps-API-PHP/#paths
Before I create that URL, I first simplify the GPS points from the trip into a minimal line using the Ramer-Douglas-Peucker algorithm. http://www.loughrigg.org/rdp/ Right now that code lives in p3k and is used to generate a simpler version of the line before passing it off to Atlas. Do you think it would be useful to have an Atlas API that runs that algorithm?
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