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Steel support leg and deck vertices lie above this narrow band and remain rigid."},{"id":"south-viaduct-foot-2--1--1","mode":"skirt","boundsBlenderM":[[104.88162459203278,-1180.211576802384,25.815318979341544],[107.88162459203278,-1177.211576802384,25.885318979341545]],"referenceElevationM":25.850318979341544,"maxDeltaM":3,"sourceCoordinates":[-122.47735250167665,37.80916921086509],"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":"south-viaduct-foot-2--1-+1","mode":"skirt","boundsBlenderM":[[103.95871577472639,-1170.2542559119568,23.34023697084807],[106.95871577472639,-1167.2542559119568,23.41023697084807]],"referenceElevationM":23.37523697084807,"maxDeltaM":3,"sourceCoordinates":[-122.47736299689545,37.8092586717772],"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":"south-viaduct-foot-2-+1--1","mode":"skirt","boundsBlenderM":[[120.8133380167163,-1178.7349226946938,28.979180655665438],[123.8133380167163,-1175.7349226946938,29.049180655665438]],"referenceElevationM":29.014180655665438,"maxDeltaM":3,"sourceCoordinates":[-122.47717132796241,37.80918247777623],"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":"south-viaduct-foot-2-+1-+1","mode":"skirt","boundsBlenderM":[[119.89042919940991,-1168.7776018042666,26.73850712258967],[122.89042919940991,-1165.7776018042666,26.80850712258967]],"referenceElevationM":26.77350712258967,"maxDeltaM":3,"sourceCoordinates":[-122.47718182318121,37.809271938672275],"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":"south-viaduct-foot-3--1--1","mode":"skirt","boundsBlenderM":[[94.06684877486659,-1118.2698112642408,14.060936093676936],[97.06684877486659,-1115.2698112642408,14.130936093676937]],"referenceElevationM":14.095936093676936,"maxDeltaM":3,"sourceCoordinates":[-122.47747548613232,37.809725720932356],"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":"south-viaduct-foot-3--1-+1","mode":"skirt","boundsBlenderM":[[93.14393995756019,-1108.3124903738137,13.00603530090578],[96.14393995756019,-1105.3124903738137,13.07603530090578]],"referenceElevationM":13.04103530090578,"maxDeltaM":3,"sourceCoordinates":[-122.47748598135112,37.809815181170244],"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":"south-viaduct-foot-3-+1--1","mode":"skirt","boundsBlenderM":[[109.99856219955011,-1116.7931571565507,18.711620976286937],[112.99856219955011,-1113.7931571565507,18.781620976286938]],"referenceElevationM":18.746620976286938,"maxDeltaM":3,"sourceCoordinates":[-122.47729431241808,37.809738987743515],"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":"south-viaduct-foot-3-+1-+1","mode":"skirt","boundsBlenderM":[[109.07565338224371,-1106.8358362661236,17.55500276906674],[112.07565338224371,-1103.8358362661236,17.62500276906674]],"referenceElevationM":17.59000276906674,"maxDeltaM":3,"sourceCoordinates":[-122.47730480763688,37.80982844796533],"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-1--1--1","mode":"skirt","boundsBlenderM":[[-110.74471263344455,1089.884289032091,31.60750431617561],[-107.74471263344455,1092.884289032091,31.67750431617561]],"referenceElevationM":31.64250431617561,"maxDeltaM":3,"sourceCoordinates":[-122.47980458095782,37.82956193731448],"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-1--1-+1","mode":"skirt","boundsBlenderM":[[-112.85448218980696,1112.6467245876077,25.660825466822725],[-109.85448218980696,1115.6467245876077,25.730825466822726]],"referenceElevationM":25.695825466822726,"maxDeltaM":3,"sourceCoordinates":[-122.479828573028,37.8297663883081],"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-1-+1--1","mode":"skirt","boundsBlenderM":[[-95.56975559643348,1091.2908020696657,26.168992209983458],[-92.56975559643348,1094.2908020696657,26.238992209983458]],"referenceElevationM":26.203992209983458,"maxDeltaM":3,"sourceCoordinates":[-122.47963201299501,37.829574570556694],"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-1-+1-+1","mode":"skirt","boundsBlenderM":[[-97.67952515279589,1114.0532376251824,20.768275144003276],[-94.67952515279589,1117.0532376251824,20.838275144003276]],"referenceElevationM":20.803275144003276,"maxDeltaM":3,"sourceCoordinates":[-122.4796560050652,37.829779021515314],"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-2--1--1","mode":"skirt","boundsBlenderM":[[-116.40598021800292,1152.6260582092218,17.979528740615613],[-113.40598021800292,1155.6260582092218,18.049528740615614]],"referenceElevationM":18.014528740615614,"maxDeltaM":3,"sourceCoordinates":[-122.47986896027774,37.83012547919929],"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-2--1-+1","mode":"skirt","boundsBlenderM":[[-118.51574977436533,1175.3884937647385,16.615761945869412],[-115.51574977436533,1178.3884937647385,16.685761945869412]],"referenceElevationM":16.650761945869412,"maxDeltaM":3,"sourceCoordinates":[-122.47989295234794,37.830329928631414],"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-2-+1--1","mode":"skirt","boundsBlenderM":[[-101.23102318099185,1154.0325712467966,13.878290610413531],[-98.23102318099185,1157.0325712467966,13.948290610413531]],"referenceElevationM":13.913290610413531,"maxDeltaM":3,"sourceCoordinates":[-122.47969639231493,37.83013811234501],"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-2-+1-+1","mode":"skirt","boundsBlenderM":[[-103.34079273735426,1176.7950068023133,12.817706103055297],[-100.34079273735426,1179.7950068023133,12.887706103055297]],"referenceElevationM":12.852706103055297,"maxDeltaM":3,"sourceCoordinates":[-122.47972038438513,37.830342561742135],"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":[[-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."},"dimensionEvidence":{"heightSource":"Golden Gate Bridge District engineering elevation2025-06-26, page4","heightM":226.42980000000003,"officialDimensions":{"mainSpanM":1280.16,"sideSpanM":343.024968,"overallNominalLengthM":2737.4088,"overallWidthM":27.432,"roadwayWidthM":18.8976,"sidewalkWidthM":3.048,"mainCableDiameterM":0.923925,"suspenderDiameterM":0.0682625,"suspenderSpacingM":15.24,"suspenderPairs":250},"registeredDimensions":{"towerSpanM":1280.5759556152066,"roadCenterlineApproxLengthM":2738.885344427343},"verticalProfile":{"datum":"Approximate MSL: historic drawing MLLW minus NOAA station9414290 MSL−MLLW0.951m, accepted tidal epoch1983–2001; no assertion of surveyed NAVD88 alignment","waterM":0,"pierTopM":12.4602,"cableSaddleM":226.42980000000003,"suspensionEndsM":65.56855200000001,"towerRoadCrownM":74.10600000000001,"midRoadCrownM":80.39097600000001,"southTerminalCrownM":55.8,"northTerminalCrownM":62.33,"sourceUrl":"https://www.goldengate.org/assets/1/25/2025-0626-bocomm-no8-seismicpresentation.pdf","page":4,"inferences":["Historic engineer elevations converted approximately to local MSL; tidal epochs differ","3% southern approach grade extended to actual OSM viaduct abutment yields~55.8m","North approach inferred nearly level after N2 at~62.33m from inspected drawing and photographic form; endpoint checked against host DEM, not surveyed","Approach footing elevations are host DEM estimates, distinct from official roadway elevations"]},"datum":"Approximate sea level; model Z0 MSL. Historic MLLW elevation converted with accepted NOAA9414290 MSL−MLLW0.951m; not surveyed NAVD88 alignment.","architecturalZones":{"towerCentersM":[[59.09732135410374,-637.5547618371484],[-59.08816271267968,637.5558096254598]],"sourceFootprints":["relation/21407754","relation/21407755","way/1560010161","way/1560010166"],"terrainTransitions":"terrain-placement.json","supportStations":"approach-support-stations.json","observedReferenceMorphology":["Four ascending open tower portals with vertical ribs","Paired main cables and thin double hangers","Open stiffening truss","Four parallel Fort Point arch ribs","Actual curved approaches continue onto both shores"],"inferredSummitBeaconAboveCableDatumM":2.2,"totalModelHeightM":228.6298},"finishEvidence":{"officialCMYK":[0,69,100,6],"sourceDisplayApproximation":"#f04a00","actualOsmColor":"#f04a00","authoredDisplayCalibration":"#d45f1f","roughness":0.9,"metalness":0,"reason":"User-reviewed rendering adjustment to soften excess red; not measured spectral paint","sourceUrl":"https://www.goldengate.org/bridge/history-research/bridge-features/color-art-deco-styling/"},"terrainConnectionEvidence":{"kind":"Explicit shore approaches, rigid suspension span","actualSourceRoadEnds":[[-122.47652130002452,37.80808895001132],[-122.48078710000925,37.832318700017765]],"terminalRoadCrownM":[55.8,62.33],"terminalTransitionLengthM":50,"terminalMaximumCorrectionM":3,"individualFootingContactCount":28,"footingHeightSource":"Host Terrarium DEM at individually sampled2.2m feet; historical engineering deck/tower datum retained separately","precisionLimit":"Bilinear host DEM has approximately38m pixels and cannot establish surveyed footing heights or reconciledNAVD88 tide datums","hostTileSha256":"3cdcbe57fc92961e80fc05df8489a40712c842fc837747312834771e878c7691"}},"license":"ODbL-1.0","attribution":"© OpenStreetMap contributors"}