One concern I have is that the points have X/Y int coords rather than lat/lng coords (as the "map" is actually basically just a large flat image and not actually the planet Earth) but I think I'd have to store them as lat/lng rather than converting them before they get loaded into MapLibre. Conversion between X/Y and lat/lng and back again would probably be "lossy"/end up giving different numbers if repeated so I'd really prefer to just store it as only (or also) X/Y. Hmm.