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Steel support leg and deck vertices lie above this narrow band and remain rigid."},{"id":"north-viaduct-foot-3--1--1","mode":"skirt","boundsBlenderM":[[-123.53595047123828,1215.199454720241,16.564919808549188],[-120.53595047123828,1218.199454720241,16.63491980854919]],"referenceElevationM":16.59991980854919,"maxDeltaM":3,"sourceCoordinates":[-122.47995004152486,37.83068750448663],"note":"Only four lowest vertices of this individual2.2m concrete footing may extend downward toDEM−0.25m. Base is initially cached host DEM+1m, never an official surveyed elevation. Steel support leg and deck vertices lie above this narrow band and remain rigid."},{"id":"north-viaduct-foot-3--1-+1","mode":"skirt","boundsBlenderM":[[-125.64572002760069,1237.9618902757577,17.166350048191564],[-122.64572002760069,1240.9618902757577,17.236350048191564]],"referenceElevationM":17.201350048191564,"maxDeltaM":3,"sourceCoordinates":[-122.47997403359506,37.83089195236143],"note":"Only four lowest vertices of this individual2.2m concrete footing may extend downward toDEM−0.25m. Base is initially cached host DEM+1m, never an official surveyed elevation. Steel support leg and deck vertices lie above this narrow band and remain rigid."},{"id":"north-viaduct-foot-3-+1--1","mode":"skirt","boundsBlenderM":[[-108.36099343422721,1216.6059677578157,13.783414377418909],[-105.36099343422721,1219.6059677578157,13.85341437741891]],"referenceElevationM":13.81841437741891,"maxDeltaM":3,"sourceCoordinates":[-122.47977747356205,37.830700137536134],"note":"Only four lowest vertices of this individual2.2m concrete footing may extend downward toDEM−0.25m. Base is initially cached host DEM+1m, never an official surveyed elevation. Steel support leg and deck vertices lie above this narrow band and remain rigid."},{"id":"north-viaduct-foot-3-+1-+1","mode":"skirt","boundsBlenderM":[[-110.47076299058962,1239.3684033133325,14.800186619176051],[-107.47076299058962,1242.3684033133325,14.870186619176051]],"referenceElevationM":14.835186619176051,"maxDeltaM":3,"sourceCoordinates":[-122.47980146563224,37.83090458537594],"note":"Only four lowest vertices of this individual2.2m concrete footing may extend downward toDEM−0.25m. Base is initially cached host DEM+1m, never an official surveyed elevation. Steel support leg and deck vertices lie above this narrow band and remain rigid."},{"id":"north-viaduct-foot-4--1--1","mode":"skirt","boundsBlenderM":[[-139.9951333303827,1275.9074719402122,20.97037584362571],[-136.9951333303827,1278.9074719402122,21.04037584362571]],"referenceElevationM":21.00537584362571,"maxDeltaM":3,"sourceCoordinates":[-122.4801372135642,37.83123277111279],"note":"Only four lowest vertices of this individual2.2m concrete footing may extend downward toDEM−0.25m. Base is initially cached host DEM+1m, never an official surveyed elevation. Steel support leg and deck vertices lie above this narrow band and remain rigid."},{"id":"north-viaduct-foot-4--1-+1","mode":"skirt","boundsBlenderM":[[-142.10490288674515,1298.669907495729,24.144962638587863],[-139.10490288674515,1301.669907495729,24.214962638587863]],"referenceElevationM":24.179962638587863,"maxDeltaM":3,"sourceCoordinates":[-122.48016120563439,37.8314372174767],"note":"Only four lowest vertices of this individual2.2m concrete footing may extend downward toDEM−0.25m. Base is initially cached host DEM+1m, never an official surveyed elevation. Steel support leg and deck vertices lie above this narrow band and remain rigid."},{"id":"north-viaduct-foot-4-+1--1","mode":"skirt","boundsBlenderM":[[-124.82017629337167,1277.313984977787,19.7857498816465],[-121.82017629337167,1280.313984977787,19.8557498816465]],"referenceElevationM":19.8207498816465,"maxDeltaM":3,"sourceCoordinates":[-122.4799646456014,37.83124540406892],"note":"Only four lowest vertices of this individual2.2m concrete footing may extend downward toDEM−0.25m. Base is initially cached host DEM+1m, never an official surveyed elevation. Steel support leg and deck vertices lie above this narrow band and remain rigid."},{"id":"north-viaduct-foot-4-+1-+1","mode":"skirt","boundsBlenderM":[[-126.92994584973408,1300.0764205333037,23.67519314065682],[-123.92994584973408,1303.0764205333037,23.74519314065682]],"referenceElevationM":23.71019314065682,"maxDeltaM":3,"sourceCoordinates":[-122.47998863767158,37.83144985039784],"note":"Only four lowest vertices of this individual2.2m concrete footing may extend downward toDEM−0.25m. Base is initially cached host DEM+1m, never an official surveyed elevation. Steel support leg and deck vertices lie above this narrow band and remain rigid."}],"evidence":{"officialDatum":"NOAA9414290 MSL−MLLW0.951m","footingEvidence":"reports/golden-gate-bridge/host/approach-foot-dem.json","footingSourceUrl":"https://s3.amazonaws.com/elevation-tiles-prod/terrarium/12/654/1582.png","method":"Bilinear Terrarium interpolation at four authored support feet; supports are photo-guided inference, northern50ft×75ft tower footprint follows District Phase1 source; DEM approximately38m pixels, not surveyed footing elevations","coordinateSystem":"Blender X east,Y north,Z up; datum≈MSL"}},"bridgeReplacement":{"sourceLayer":"roads","names":["Golden Gate Bridge","Golden Gate Bridge East Sidewalk","Golden Gate Bridge West Sidewalk"],"includeUntaggedNamedSegments":true,"coverage":0.95,"buildingFootprint":{"type":"MultiPolygon","coordinates":[[[[-122.47947782278061,37.82550373484801],[-122.4794751405716,37.82546348088739],[-122.47945636510849,37.82542746416719],[-122.47943222522736,37.825395684693575],[-122.47901380062103,37.82542746416719],[-122.47899770736694,37.8254613622573],[-122.4789896607399,37.825499497590044],[-122.47900038957596,37.8255567005522],[-122.47903525829315,37.825607547592455],[-122.47945368289948,37.825577886823226],[-122.47946977615356,37.82554398878666],[-122.47947782278061,37.82550373484801]]],[[[-122.47813671827316,37.81401563479018],[-122.47813403606415,37.81398808832202],[-122.4781330478822,37.81398808832202],[-122.47813135385513,37.81397537456401],[-122.4781259894371,37.81396054184357],[-122.47809112071991,37.81390756781768],[-122.47767001390457,37.813939352237796],[-122.47765392065048,37.813973255604125],[-122.47765183448759,37.81398808832202],[-122.47765123844147,37.81398808832202],[-122.47764855623245,37.81401139687266],[-122.47765928506851,37.81406860873851],[-122.47769147157669,37.81411946369316],[-122.47811257839203,37.814089798307194],[-122.4781259894371,37.81405589499437],[-122.47813671827316,37.81401563479018]]]]},"buildingCoverage":0.8,"buildingFootprintEvidence":"Two separate tower base outlines from Protomaps buildings, inspected 2026-10-08; matches the obsolete OSM tower-building interpretation alongside the modeled tower locations. This footprint excludes the suspended road corridor and Fort Point."},"aliases":[],"authors":["Open Landmarks contributors"],"artisticLicense":"CC-BY-4.0","spatialDataLicense":"ODbL-1.0","licenseScope":"CC BY applies to original artistic contributions only; ODbL applies to OSM-derived spatial data. Reference photographs retain their own licenses. Dimension evidence from undefined retains undefined.","assistance":"AI-assisted architectural interpretation and procedural recipe authoring; deterministic Python/Blender export. No photographic textures.","review":{"status":"pending","reviewer":null,"checks":{}},"modelingNotes":["Source plan: actual OSM man_made=bridge relation21407754, Marin approach21407755, San Francisco approach1560010161 and Fort Point arch1560010166; original tags and geometry retained. Tower centers average the mapped bridge-tower leg outlines. The obsolete height.01 building relation19109535 is not the model source.","Official District design statistics https://www.goldengate.org/bridge/history-research/statistics-data/design-construction-stats/ give4200ft tower span,1125ft side spans,90ft overall width,62ft curb roadway,10ft sidewalks,746ft tower/cable saddle,36 3/8in main cable diameter and250 pairs of2 11/16in vertical suspender ropes at50ft spacing. Model tower spacing1280.576m follows OSM,0.416m beyond official nominal1280.16m.","Official engineering elevation, District2025-06-26 seismic presentation page4 https://www.goldengate.org/assets/1/25/2025-0626-bocomm-no8-seismicpresentation.pdf: historic MLLW crown elevations218.24ft at side pylons,246.25ft at towers,266.87ft at midpoint; pier top44ft; cable saddle746ft;3% approach tangent. These are separate from navigation clearance220ft above historic MHHW.","Z0 is approximate mean sea level. NOAA9414290 accepted tidal epoch1983-2001 gives MSL−MLLW0.951m; historic engineering elevations are converted by feet×0.3048−0.951. Tidal epochs/datums differ; this is not a surveyed NAVD88 reconciliation. Host DEM must not translate the main span to seabed or ground.","International Orange source evidence is the official CMYK0/69/100/6, approximated as#f04a00 and matching actual OSM colour. https://www.goldengate.org/bridge/history-research/bridge-features/color-art-deco-styling/ . The named golden-gate-orange finish is an authored display calibration#d45f1f,roughness.9,metalness0, selected after user review to soften excess red; it is not a measured spectral paint color. Art Deco ribs and the four ascending open portals are observed in individually inspected Commons photographs.","The main cable parabola has an authored midpoint3.3m above the official road crown; side cable and anchorage profiles, tower taper/rib section, truss depth7m and repeated members are photograph-guided inference. The small source-observed summit beacon2.2m above the official cable-saddle datum is inferred, giving total model height228.63m. The low LOD samples every third suspender station with single ropes, simpler ribs and larger truss panels; both retain real air beneath and between structural members.","Real curved OSM carriageway approaches continue to actual land abutments. Southern terminal crown55.8m extends the official3% tangent; northern terminal62.33m is inferred nearly level beyondN2 from the official elevation and inspected aerials. These inferred terminal heights match host DEM within1m and have separate limited50m transition contacts; span/towers/cables stay rigid.","Four Marin approach support towers use official50×75ft footprints from https://www.goldengate.org/district/district-projects/seismic-retrofit/phase-1/ . Their longitudinal stations and the three southern steel bents are photo-guided, not surveyed. Individual footing bottoms use cached host Terrarium DEM estimates+1m and narrow downward skirt contacts; coarse38m pixels are not a footing survey.","Four parallel real open Fort Point arch ribs and lattice spandrels follow the inspected public-domain HAER photograph. No masonry curtain or artificial terrain block fills the arch or suspended span. Fine wire safety-net mesh, rivets and vehicles are omitted at these budgets."],"source":{"url":"/objects/fb365cac3db7b6c4296659c4b5a8a0150cec17c45fd7a553e050c4db7f9be11f/source.blend.gz","bytes":997897,"sha256":"fb365cac3db7b6c4296659c4b5a8a0150cec17c45fd7a553e050c4db7f9be11f"},"spatialSource":{"url":"/objects/b9d71e38498452817cab5ece9cc3d99272aa98d21ce8f9843fb1e3ff92c25b94/spatial-source.json","bytes":44580,"sha256":"b9d71e38498452817cab5ece9cc3d99272aa98d21ce8f9843fb1e3ff92c25b94"},"preview":{"url":"/objects/bfad1c7bba6ad634ba9ff66fecc60fd6e9584ab0785c6943a96ab257949a208a/preview.webp","bytes":70220,"sha256":"bfad1c7bba6ad634ba9ff66fecc60fd6e9584ab0785c6943a96ab257949a208a"},"previewDirection":[1.7,0.3,0.8],"revision":"12551dd67e67318a49e8b6877cf9eae089c51cd186542de957e0449abfe4927f","publicationRevision":"28637cfcb1bd781c3fd5c373654ead0329b0ff01913cef676803732097bebb09","bounds":[-122.4809672,37.807988,-122.4763972,37.8323775],"approved":false,"materialLibrary":{"schemaVersion":1,"sha256":"7afc40cf0b82b7c3c054f287817be2a37e52192aa734f187f8b20ee3277187dd","url":"/materials/7afc40cf0b82b7c3c054f287817be2a37e52192aa734f187f8b20ee3277187dd.json"},"metadata":"/assets/golden-gate-bridge/28637cfcb1bd781c3fd5c373654ead0329b0ff01913cef676803732097bebb09/asset.json","validation":"/assets/golden-gate-bridge/28637cfcb1bd781c3fd5c373654ead0329b0ff01913cef676803732097bebb09/validation.json"}