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It is implemented using web maps technology (https://leafletjs.com/ https://leafletjs.com/), similar to e.g. the Google Maps satellite view. The screenshots are
by cloud-oak 1y ago
It is implemented using web maps technology (https://leafletjs.com/ https://leafletjs.com/), similar to e.g. the Google Maps satellite view. The screenshots are then served pre-assembled into quadratic map tiles at different zoom levels. This way the client only ever has to load and display a hand ful of relevant tiles.