schema int64 | built_at timestamp[s] | slope_threshold_deg string | shards list | license string | attribution string | caveat string |
|---|---|---|---|---|---|---|
2 | 2026-10-30T04:37:36 | 6.0 | [
{
"id": "w125-w121",
"path": "map/avoid_w125-w121.mbtiles",
"bytes": 81268736,
"sha256": "d2f176e9164d5c6dd3bb3a229553777f54c1f6783f5c93175230f33a7e3c29da"
},
{
"id": "w121-w118",
"path": "map/avoid_w121-w118.mbtiles",
"bytes": 78049280,
"sha256": "163cf6677584892085c942c06170fa3... | ODbL-1.0 | Land cover: USGS Annual NLCD. Crops: USDA NASS CDL. Elevation: USGS 3DEP. Obstacles: FAA DOF. Solar: USGS USPVDB. Wind turbines: USGS USWTDB. Transmission lines: HIFLD/ORNL, which includes data © OpenStreetMap contributors. Advisory only — not for navigation. | Shows only reasons NOT to land. Unpainted ground is not checked: distribution wires, fences, ditches, crops, livestock and surface condition are not mapped anywhere public. |
Where not to go — contiguous US
One byte per ~30 m pixel (Web Mercator z8–z12), each bit a reason NOT to put an aeroplane down: power lines and utility poles, towers/turbines/obstacles, solar farms, orchards/vineyards/hop poles, ground steeper than 6.0° at 30 m, and optionally water, built-up areas and trees.
It never shows where to land. Distribution and farm wires, fences, ditches, crops, livestock and surface condition are not mapped anywhere public: unshaded ground is not safe ground. Advisory only — not for navigation.
- Built 2026-10-30T04:37:36Z from 955 one-degree cells; 1.52 GB in
17 longitude bands (
map/), listed with sha256 inindex.json. - Each band holds whole z8 tile columns and every tile below them: a tile is in exactly one band.
- Sources: Land cover: USGS Annual NLCD. Crops: USDA NASS CDL. Elevation: USGS 3DEP. Obstacles: FAA DOF. Solar: USGS USPVDB. Wind turbines: USGS USWTDB. Transmission lines: HIFLD/ORNL, which includes data © OpenStreetMap contributors. Advisory only — not for navigation.
- Tiles: MBTiles, format
avoid1; each tile isAVD1+ raw DEFLATE of 256×256 bytes. - Licence: ODbL 1.0 (the transmission-line source includes OpenStreetMap-derived features).
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