Looked at their source code out of curiosity. They use Elasticsearch as a geo backend, tile server that renders PNG images server side for each map tile request.
- low zoom -> server aggregated grid
- high zoom -> switcher to point tiles
browser just displays images, there is no work to do on client side..
alt Hacker News
Looked at their source code out of curiosity. They use Elasticsearch as a geo backend, tile server that renders PNG images server side for each map tile request.
- low zoom -> server aggregated grid
- high zoom -> switcher to point tiles
browser just displays images, there is no work to do on client side..
I generated a visual schematic how these kind of systems work: https://vectree.io/c/server-side-geo-tile-rendering-elastics...