Points of interest (cafe, shops, water, toilets, bank/ATM, bus, shelter,
viewpoint, ...) as circular contrasting badges (emoji in a white/dark circle,
readable on light and dark tiles) — not pins. A 📍 control toggles the layer
and opens a per-category filter (checkboxes, remembered). Markers are culled to
the visible bounds and shown from zoom 13 (cap 500/view), on the recording,
track-detail and roads maps.
Data is bundled and fully offline: frontend/data/pois.json ([{la,lo,c,n}], 358KB,
5662 POIs) fetched once from Overpass for ~100km around Novocherkassk (the whole
bbox returned in one query; adaptive subdivision was ready if it had truncated).
Verified functionally on device: 124 badges rendered in view at z16 over
Novocherkassk with correct bounds/category culling; the live visual could not be
screenshotted (the WebView surface is black under CDP). frontend/data + poi.js.
4aiman
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