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docs(cctv): describe the ground-height data plainly (#443)

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Follow-up to #433.
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Bilawal Sidhu authored and GitHub committed 2026-09-13 21:54:29 -05:00
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CHANGELOG.md
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@@ -95,9 +95,9 @@ of current runtime behavior, see [`docs/CURRENT-STATE.md`](docs/CURRENT-STATE.md
rigidly by the largest clearance deficit over a 3×3 grid of support points
against the ground under each (the ground at the mount where nothing finer is
known), and the client honours pack ranges instead of inflating them to 220 m.
`src/data/local_data/cctv_ground_heights/` ships Google 3D Tiles ground heights under
every camera's mount and plane footprint (3,445 of 3,446 cameras), produced by
`scripts/precompute-cctv-heights.mjs`; cameras with shipped heights are placed
`src/data/local_data/cctv_ground_heights/` ships precomputed ground heights under
every camera's mount and plane footprint (3,445 of 3,446 cameras), aligned to work
with Google Photorealistic 3D Tiles; cameras with shipped heights are placed
with zero runtime sampling, and the rest resolve the ground under their plane
from the Re:Earth DEM on activation. The footprint lift is capped at 60 m
above the mount-based lift so a tower under a far edge cannot launch the plane.