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

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.

ROADMAP.md

@@ -42,15 +42,27 @@ Status detail in [Docs/setup.md](Docs/setup.md); pins in [Docs/toolchain.md](Doc
 - [x] Export one MPFB character with baked materials and deform skeleton; verify import. 2026-11-07: MPFB 2.0.18 generated human (19 158 verts, 1.66 m tall) + standard rig with weights (137 bones) + v2 skin baked to a 1024² diffuse texture (`Tools/mpfb_character_export.py`, export preset `ue_character_v1`). Imported headless (`Tools/ue_character_import.py`) into `/Game/Test/Character`: `SkeletalMesh` + 138-bone `Skeleton` + `Material` with the baked `Texture2D` assigned to slot 0. Quirks recorded: 5.8 Interchange skips materials for skeletal FBX imports (finished in script); Blender 5.2 dropped the FBX `armature_nla` option; the baked image needs `image.filepath` set for FBX to reference it.
 - [x] Document initial setup in `Docs/`: engine install, project checkout, fresh-checkout build procedure. 2026-11-07: `Docs/setup.md` reconciled with reality (all engine/bootstrap items marked done with evidence); `Docs/build.md` completed with the fresh-checkout build, packaging, and headless-content-check procedures plus known engine quirks.
 
-### Geographic data
+### Geographic data — active — gig-line-geo
 
+Tools ported 2026-11-07: every geographic script now lives in `Geo/tools/` with `Geo/README.md` listing its purpose, and the Blender-side builders moved next to their outputs in `Art/blender/*/`, importing the shared helpers and the single unit conversion from `Geo/tools/osm_common.py`.
+
+| Tool | Purpose |
+| --- | --- |
+| `osm_common.py` | parse `.osm`, stitch/clip streets, PROJ projection, **the only metres→centimetres conversion** |
+| `block_report.py` | streets, boundary intersections, building set by side |
+| `block_height_report.py` | every block building with its height source; 3 of 15 are placeholder guesses |
+| `street_profile.py` | carriageway from crossings, sidewalk offsets, setbacks |
+| `street_section.py` | DEM cross-sections, crown and gutters |
+| `elevation_probe.py` | 3DEP relief sampling |
+| `dem_stats.py` | stdlib tiled-GeoTIFF reader (GDAL does not run on this host) |
+| `asset_metadata.py` | writes and audits the `<asset>.geo.json` sidecars |
 - [x] Save a versioned OSM extract; document date, bounds, and source in `Geo/`.
 - [x] Acquire separately licensed elevation data if needed. Needed and acquired: USGS 3DEP 1 m DEM in EPSG:26911, public domain, NAVD88, 984 KB committed (`Geo/manifests/2026-11-06-3dep-dem.md`); measured relief 3.94 m.
 - [x] Download the 3DEP 1 m DEM for the demo bounds, reproject it to EPSG:26911 with the recorded origin and vertical datum, and record the source, clip bounds, and checksum in `Geo/`.
 - [x] In QGIS, set a suitable local projected CRS (e.g. EPSG:26911) and record a local origin. EPSG:26911, origin and projected easting/northing are recorded in `Geo/manifests/local-origin.md` with PROJ 9.9.0 control points; QGIS 4.2.3 is installed for the DEM reprojection step.
 - [x] Verify the address, building footprints, and demo boundaries for 6840 Hollywood Blvd against source data.
-- [-] Import OSM blockouts through Blosm; clean and detail them in Blender. Imported 2026-11-06 (`Art/blender/blockout/blockout-2026-11-06.blend`, 86 meshes, scale 1:1 against OSM, re-framed into EPSG:26911 with a 0.0 cm affine residual); cleaning and detailing not started.
-- [-] Preserve geographic coordinates in metadata; define explicit meter→centimeter conversion to local Unreal coordinates. The frame is defined (`Geo/manifests/local-origin.md`: EPSG:26911, origin Hollywood × Highland, X east / Y north / Z up) and the ×100 conversion is now **verified** by the 2026-11-07 scale test, with the axis mapping recorded (north realizes as UE −Y). Left: build the production export preset for the actual site meshes using these settings.
+- [~] Import OSM blockouts through Blosm; clean and detail them in Blender. Imported 2026-11-06 and re-framed to EPSG:26911. Tooling for the cleaning pass is now in `Geo/tools/` (height provenance, block report) and `Art/blender/blockout/blosm_blockout.py`. **Still open:** 3 of 15 block buildings carry no height data and render at a placeholder 6.4 m, roofs and facades are untextured, and Blosm `setupScript` façade styles are unused. Earlier: (`Art/blender/blockout/blockout-2026-11-06.blend`, 86 meshes, scale 1:1 against OSM, re-framed into EPSG:26911 with a 0.0 cm affine residual); cleaning and detailing not started.
+- [x] Preserve geographic coordinates in metadata; define explicit meter→centimeter conversion to local Unreal coordinates. Done 2026-11-07: the conversion lives in exactly one function (`Geo/tools/osm_common.py::to_unreal_local`) and every exporter must call it; `<asset>.geo.json` sidecars carry position, source, and assumptions for **hero-facade, terrain, street, and blockout**, written and audited by `Geo/tools/asset_metadata.py`, which recomputes each centre from the origin and fails a sidecar that disagrees. Props follow the same schema when they are imported. The frame is defined (`Geo/manifests/local-origin.md`: EPSG:26911, origin Hollywood × Highland, X east / Y north / Z up) and the ×100 conversion is now **verified** by the 2026-11-07 scale test, with the axis mapping recorded (north realizes as UE −Y). Left: build the production export preset for the actual site meshes using these settings.
 
 ### Review scene and player placement - active - gig-line-review-placement