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geo: one tool directory, one unit boundary, per-asset provenance

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Geo/tools/ is now every geographic script, with Geo/README.md documenting each
one; the Blender-side builders moved beside their outputs in Art/blender/*/ and
import their helpers from Geo/tools/osm_common.py.

That module gains to_unreal_local() and to_blender_local(): the only place in the
repository that multiplies metres by 100, so a second silent scale cannot be
introduced. block_height_report.py adds height provenance for the block — 3 of
15 buildings have no height data and render at a placeholder 6.4 m.
asset_metadata.py writes and audits <asset>.geo.json sidecars; four now exist
(hero-facade, terrain, street, blockout) and the audit recomputes each centre from
the origin, failing anything that disagrees.
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zwitschi committed 2026-11-07 12:28:26 +01:00
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Geo/verification/2026-11-06-cross-sections.md
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# Cross-sections — crowned road, gutters, sidewalk shelves
Sampled 2026-11-06 from the local 3DEP DEM (`Geo/raw/dem-3dep-1m-26911-2026-11-06.tif`) with `Geo/scripts/street_section.py`. Seven sections at 40 m spacing, offsets −18 m to +18 m from the boulevard centreline (negative = south), 1 m sampling step.
Sampled 2026-11-06 from the local 3DEP DEM (`Geo/raw/dem-3dep-1m-26911-2026-11-06.tif`) with `Geo/tools/street_section.py`. Seven sections at 40 m spacing, offsets −18 m to +18 m from the boulevard centreline (negative = south), 1 m sampling step.
## What the profile shows
Geo/verification/2026-11-06-elevation.md
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# Elevation check — Hollywood Blvd block
Measured 2026-11-06 with `Geo/scripts/elevation_probe.py` against the USGS Elevation Point Query Service (3DEP, 1 m seamless DEM, raster id 129943). Raw responses: `Geo/raw/epqs-2026-11-06.json`. Reproduce with:
Measured 2026-11-06 with `Geo/tools/elevation_probe.py` against the USGS Elevation Point Query Service (3DEP, 1 m seamless DEM, raster id 129943). Raw responses: `Geo/raw/epqs-2026-11-06.json`. Reproduce with:
```bash
python3 Geo/scripts/elevation_probe.py Geo/raw/osm-api-map-2026-11-06.osm --workers 5
python3 Geo/tools/elevation_probe.py Geo/raw/osm-api-map-2026-11-06.osm --workers 5
```
Heights are **orthometric, NAVD88**, as published for 3DEP CONUS. They are not ellipsoidal heights and must not be mixed with GPS/ellipsoid values.
Geo/verification/2026-11-06-street-profile.md
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# Street profile — Hollywood Blvd block
Measured 2026-11-06 from the block extract (`Geo/raw/osm-api-map-2026-11-06.osm`) with `Geo/scripts/street_profile.py`. Reproduce with:
Measured 2026-11-06 from the block extract (`Geo/raw/osm-api-map-2026-11-06.osm`) with `Geo/tools/street_profile.py`. Reproduce with:
```bash
python3 Geo/scripts/street_profile.py Geo/raw/osm-api-map-2026-11-06.osm
python3 Geo/tools/street_profile.py Geo/raw/osm-api-map-2026-11-06.osm
```
All distances are metres, computed on a local planar approximation at the block's mean latitude (error well under 1 cm over 300 m). OSM is layout data; these are geometry measurements, not a survey.