How do I use this tool

[piw-bot]

I didnt see any instructions on how to use this. Download the source code and then what to I do with it? I dont understand how to import a gpx file to convert it to a heatmap.

[erik]

There's a hosted version on https://erik.github.io/derive. Just drag and drop files into the browser.

[piw-bot]

Thank you, that made things a lot easier!

[erik]

Cool, glad to hear!