Peak Map allows you to visualize elevation of any area on the map with filled area charts (also known as a ridgeline)
Think of Joy Division’s famous “Unknown Pleasures” album cover, but then as a map of the world.
What surprised me is that here’s no set of pre-generated custom map tiles, but they are instead generated on the fly
I’m using MapBox GL to draw the map. Once the area is selected, I’m using elevation data API from the MapBox.
The rendering of the lines is done on canvas overlay, using regular 2D canvas context.