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fix(annotations): cull and budget surface height sampling

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Said committed 2026-10-20 01:06:53 +01:00
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docs/CURRENT-STATE.md
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# God's Eye View Current State
Screen annotations reject hidden records and anchors wholly behind the camera or globe horizon before surface sampling. Unresolved visible heights share a 32-sample projection-pass budget, retry at most once per second per anchor on rendered frames, and retain no extra timer or listener. Unsettled points continue retrying as late terrain arrives; behind-camera, horizon and conservative frustum culls run before sampling. Validated heights remain settled in the bounded cache.
Shared distance checks use `src/geoDistance.js` with `{ lat, lon }` points and
the IUGG mean spherical Earth radius, 6371.0088 km. `greatCircleKm` is
canonical; `greatCircleMeters` is its exact metre conversion. Missing,