Generate a heatmap from GPX data.
Drag and drop one or more GPX files into the window. No data is ever uploaded, everything is done client side.
Loosely inspired by The Passage Ride, which you should join if you ever find yourself in Los Angeles on any given Wednesday night.
http://library.nothingness.org/articles/SI/en/display/314
Install dependencies
$ npm install
Build bundle
$ webpack
Run on webpack dev web server
$ webpack-dev-server --progress --colors
If you use Strava, go to your profile page and click "Download all your activities". You'll get an email containing a ZIP file of all the GPX files you've generated so far.