gig-line/Geo/verification/2026-11-06-el-capitan-block.md

Verified structures — El Capitan Entertainment Centre block

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/.

Method

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.
2. Full geometry of the returned way from the OSM API (https://api.openstreetmap.org/api/0.6/way/<id>/full.json), saved verbatim.
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.

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.

6840 Hollywood Blvd — El Capitan Entertainment Centre

Field	Value
OSM way	424024147
Name tag	El Capitan Entertainment Centre
Address tags	addr:housenumber=6840, addr:street=Hollywood Boulevard, addr:city=Los Angeles, addr:postcode=90028
Type tags	amenity=theatre, building=yes, height=14.5
Identity tags	wikidata=Q3139424, wikipedia=en:Hollywood Masonic Temple
Nominatim centroid	34.1011552, −118.3401615
Footprint bbox	lat 34.1009186 … 34.1014116, lon −118.3402987 … −118.3400194
Footprint size	25.7 m east–west × 54.9 m north–south
Footprint area	≈ 1387 m² (12 nodes)
Raw file	Geo/raw/osm-way-424024147.json, sha256 b2661667…6644949

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.

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.

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.

6838 Hollywood Blvd — El Capitan Theatre (distinct structure)

Field	Value
OSM way	424024148
Name tag	El Capitan Theatre
Address tags	addr:housenumber=6838, addr:street=Hollywood Boulevard
Type tags	amenity=cinema, building:levels=6 (no height tag)
Nominatim centroid	34.1010991, −118.3398096
Footprint bbox	lat 34.1009172 … 34.1014101, lon −118.3400228 … −118.3396041
Footprint size	38.6 m east–west × 54.9 m north–south
Footprint area	≈ 1953 m² (31 nodes)
Raw file	Geo/raw/osm-way-424024148.json, sha256 6da8d316…6ea92636

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.

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.

Demo bounds and building set

From the block extract in ../manifests/2026-11-06-osm-api-map.md (Geo/raw/osm-api-map-2026-11-06.osm, 3565 nodes, 350 ways).

Intersections on the boulevard:

Junction	Node coordinate
Hollywood Blvd × North Orange Drive	34.101543, −118.341434 (and a second node at −118.341749 on the boulevard's south carriageway split)
Hollywood Blvd × North Highland Avenue	34.101545, −118.338718

The block between them spans 279 m of frontage. Boulevard centreline inside the block sits at latitude ≈ 34.101544.

South frontage, west to east (the 0.1.0 south set):

Way	Address	Name	Tags	Height
424024151	6922	—	commercial, 12 levels	no height tag
206486872	6902	—	retail	13.8
424024147	6840	El Capitan Entertainment Centre	theatre	14.5
424024148	6838	El Capitan Theatre	cinema, 6 levels	no height tag
424024144	6822	Budget	car_rental	5.5
424024150	6806–6820	—	retail	12.1
424024149	6800	Lee Drug Building	retail	12.1

North side within the 50 m buffer (measured from the boulevard centreline, so these are the only two buildings inside the buffer):

Way	Address	Name	Tags	Distance from centreline	Height
424105908	6925	TCL Chinese Theatre	cinema	30.1 m	18.1
424105889	6933	Madame Tussaud's	commercial	37.3 m	15.9

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.

Still unverified

• 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.
• Crossing location. No marked crossing geometry confirmed yet, and 0.1.0 requires one designated crossing.
• 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.
• 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.
• 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 and unresolved.

Next: measure roadway and sidewalk widths, fix the local CRS and origin, and resolve the façade-width conflict before any façade modelling.