TL;DR I made a demo project of how to use Golang to produce the map tiles for use in LeafletJS’s tile layer. I did it mainly to catalog how I managed to solve a few of the issues I had faced in a real-world project, just in case it would be useful to someone (future me included). Some of the things I had to solve were: How to tile map images on the fly in Go How to cope with updating the image for a given area (e.