zwitschi
737e16e7db
Inventory the sibling security-game project and copy only the evidence: nine licensed photos with their sidecar provenance into Art/reference/hollywood/, now LFS-tracked. Add the block-wide OSM extract with a manifest, resolve the demo bounds (Orange Dr -118.341434 .. Highland Ave -118.338718, 279 m) and the south/north building sets, and add Geo/scripts/block_report.py to reproduce it. The sibling docs place the El Capitan Theatre west of 6840; OSM geometry and the house numbering put it east. Recorded with the two unresolved measurement conflicts rather than averaged.
95 lines
6.2 KiB
Markdown
95 lines
6.2 KiB
Markdown
# Verified structures — El Capitan Entertainment Centre block
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Verification pass: 2026-11-06 21:41 CET. Address identity and footprint geometry checked against OpenStreetMap before any modelling, as `AGENTS.md` requires. Raw responses are checksummed in `Geo/raw/`.
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## Method
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1. Address lookup against Nominatim (`https://nominatim.openstreetmap.org/search?q=…&format=jsonv2&addressdetails=1`), one request at a time with a project user agent.
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2. Full geometry of the returned way from the OSM API (`https://api.openstreetmap.org/api/0.6/way/<id>/full.json`), saved verbatim.
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3. Bounding box and polygon area computed locally: lat/lon converted to metres with the mean latitude as the reference, shoelace area on the resulting planar ring.
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OSM is layout data. The footprint and the `height` tag are not survey-grade and are not authoritative for façade, height, or pavement detail. They establish identity, position, and gross massing only.
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## 6840 Hollywood Blvd — El Capitan Entertainment Centre
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| Field | Value |
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| --- | --- |
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| OSM way | 424024147 |
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| Name tag | `El Capitan Entertainment Centre` |
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| Address tags | `addr:housenumber=6840`, `addr:street=Hollywood Boulevard`, `addr:city=Los Angeles`, `addr:postcode=90028` |
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| Type tags | `amenity=theatre`, `building=yes`, `height=14.5` |
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| Identity tags | `wikidata=Q3139424`, `wikipedia=en:Hollywood Masonic Temple` |
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| Nominatim centroid | 34.1011552, −118.3401615 |
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| Footprint bbox | lat 34.1009186 … 34.1014116, lon −118.3402987 … −118.3400194 |
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| Footprint size | 25.7 m east–west × 54.9 m north–south |
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| Footprint area | ≈ 1387 m² (12 nodes) |
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| Raw file | `Geo/raw/osm-way-424024147.json`, sha256 `b2661667…6644949` |
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Reading: a narrow street frontage (~26 m) with a deep auditorium/temple mass (~55 m) running south, `height=14.5`. That is consistent with the reference photographs of a three-storey temple elevation plus parapet, but the height tag is a single number and carries no cornice or parapet information.
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Address parity check: 6840 is even, and even numbers on Hollywood Boulevard run along the south side — consistent with the `0.1.0` brief of south-side frontage.
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The Wikidata/Wikipedia identity is the **Hollywood Masonic Temple**, which is the El Capitan Entertainment Centre. That corroborates the address/name pairing rather than relying on the display name alone.
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## 6838 Hollywood Blvd — El Capitan Theatre (distinct structure)
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| Field | Value |
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| --- | --- |
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| OSM way | 424024148 |
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| Name tag | `El Capitan Theatre` |
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| Address tags | `addr:housenumber=6838`, `addr:street=Hollywood Boulevard` |
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| Type tags | `amenity=cinema`, `building:levels=6` (no `height` tag) |
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| Nominatim centroid | 34.1010991, −118.3398096 |
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| Footprint bbox | lat 34.1009172 … 34.1014101, lon −118.3400228 … −118.3396041 |
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| Footprint size | 38.6 m east–west × 54.9 m north–south |
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| Footprint area | ≈ 1953 m² (31 nodes) |
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| Raw file | `Geo/raw/osm-way-424024148.json`, sha256 `6da8d316…6ea92636` |
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Its west edge (−118.3400228) abuts the east edge of 6840 (−118.3400194): the two are adjacent, separate buildings, drawn as separate ways with different `amenity` values, footprints, and heights.
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**Rule applied:** the similarly named "El Capitan Theatre" and "El Capitan Entertainment Centre" are distinct structures. They are not merged, and the façade work for one does not authorise geometry for the other.
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## Demo bounds and building set
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From the block extract in [`../manifests/2026-11-06-osm-api-map.md`](../manifests/2026-11-06-osm-api-map.md) (`Geo/raw/osm-api-map-2026-11-06.osm`, 3565 nodes, 350 ways).
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Intersections on the boulevard:
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| Junction | Node coordinate |
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| --- | --- |
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| Hollywood Blvd × North Orange Drive | 34.101543, −118.341434 (and a second node at −118.341749 on the boulevard's south carriageway split) |
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| Hollywood Blvd × North Highland Avenue | 34.101545, −118.338718 |
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The block between them spans **279 m** of frontage. Boulevard centreline inside the block sits at latitude ≈ 34.101544.
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South frontage, west to east (the `0.1.0` south set):
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| Way | Address | Name | Tags | Height |
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| --- | --- | --- | --- | --- |
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| 424024151 | 6922 | — | commercial, 12 levels | no `height` tag |
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| 206486872 | 6902 | — | retail | 13.8 |
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| **424024147** | **6840** | **El Capitan Entertainment Centre** | **theatre** | **14.5** |
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| **424024148** | **6838** | **El Capitan Theatre** | **cinema, 6 levels** | **no `height` tag** |
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| 424024144 | 6822 | Budget | car_rental | 5.5 |
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| 424024150 | 6806–6820 | — | retail | 12.1 |
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| 424024149 | 6800 | Lee Drug Building | retail | 12.1 |
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North side within the 50 m buffer (measured from the boulevard centreline, so these are the only two buildings inside the buffer):
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| Way | Address | Name | Tags | Distance from centreline | Height |
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| --- | --- | --- | --- | --- | --- |
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| 424105908 | 6925 | TCL Chinese Theatre | cinema | 30.1 m | 18.1 |
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| 424105889 | 6933 | Madame Tussaud's | commercial | 37.3 m | 15.9 |
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Excluded and why: `6780` (Bank of America) and everything east of it is east of Highland, outside the block. Madison Apartments (1746 N Orange Dr) and the Orange Drive apartments are 155 m back from the boulevard. One unnamed retail way sits 66 m back — outside the buffer. `building:part` roof ways are detail, not separate structures.
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## Still unverified
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- **Pavement and roadway widths.** The extract carries no sidewalk or carriageway widths. Needed for the walkable demo, the crossing, and street scale against the reference photos.
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- **Crossing location.** No marked crossing geometry confirmed yet, and `0.1.0` requires one designated crossing.
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- **Elevation.** No DEM checked. The choice between using a separately licensed DEM and skipping it depends on measured height variation across the 279 m block.
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- **North-side reference photography.** Both north-side buildings are in scope and neither appears in the reference set. They cannot be detailed from evidence yet.
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- **Façade width conflict.** 29.6 m from the sibling project's venue notes against the 25.7 m OSM bbox; recorded in [`../../Art/reference/hollywood/NOTES.md`](../../Art/reference/hollywood/NOTES.md) and unresolved.
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Next: measure roadway and sidewalk widths, fix the local CRS and origin, and resolve the façade-width conflict before any façade modelling.
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