Trailmap

This is sample content. Replace it with your own write-up, or delete the file.

What it does

Trailmap lets you load GPX tracks, see them on a vector map, and read an elevation profile that follows your cursor. Tiles are cached so the map keeps working with no signal.

Highlights

• Service worker caches tiles for any region you have viewed.
• Elevation profile is rendered on a canvas and stays smooth with 50k-point tracks.
• Imports and exports GPX with no server involved.

What I learned

A short paragraph on the hard parts, the trade-offs, and what you would do differently.