It flopped on Show HN, but got some minor traction in a comment:
https://CubeTrek.com visualize your GPS Tracks in 3D. You upload your skiing, hiking, running GPS files and the web app creates 3D topographic models, calculates your monthly totals, automatically compares similar activities... Give it a try.
This is incredible! I have had an extremely similar idea in my head for the past two years, but I have never gotten around to actually building it. Awesome to see that I am not the only one who has had this idea! (Now I just need something else to think about when I am doing my daily runs…)
https://CubeTrek.com visualize your GPS Tracks in 3D. You upload your skiing, hiking, running GPS files and the web app creates 3D topographic models, calculates your monthly totals, automatically compares similar activities... Give it a try.