# Long-trail record. Field meanings: docs/schema.md in this repository.

id = "backbone"
name = "Backbone Trail"
short_name = "BBT"
country = "US"
regions = ["CA"]
length_km = 108
length_note = "67 mi published"
tier = "regional"
designation = "Santa Monica Mountains National Recreation Area trail"
wave = 1

[source]
status = "found"
publisher = "National Park Service, Santa Monica Mountains NRA"
url = "https://mapservices.nps.gov/arcgis/rest/services/NationalDatasets/NPS_Public_Trails_Geographic/FeatureServer/0"
discovery = "arcgis-layer-edit-date: GET <layer>?f=json and read the layer's last edit date, when it exposes one (and the feature count); fetch again when either changes"
format = "ArcGIS FeatureServer, filter TRLNAME LIKE '%Backbone%' (50 pieces)"
crs = "EPSG:4326"
licence = "ODbL-1.0"
licence_text = "OpenStreetMap contributors, ODbL 1.0 (share-alike). Credit: © OpenStreetMap contributors. The OpenStreetMap copyright page states: 'You are free to copy, distribute, transmit and adapt our data, as long as you credit OpenStreetMap and its contributors.' (https://www.openstreetmap.org/copyright, read 2026-11-09). The track included here is from OpenStreetMap, relation 2748910."
attribution = "OpenStreetMap contributors (ODbL)"
osm_only = true
mainline = "Pieces only; not checked for completeness."
source_checked = "2026-11-08"
redistributable = true
line_source = "OpenStreetMap"
line_file = "line.geojson"

[osm]
relation = 2748910
note = "OSM 2748910."

[shield]
status = "no-logo-exists"
logo_source = ""
contact = "NPS Santa Monica Mountains NRA"
note = "No trail emblem exists. The file removed on 2026-11-08 was the generic NPS arrowhead (the agency mark, not the trail's), fetched from an NPS park page. The map draws the trail name only."
logo_file = ""
logo_owner = "NPS Santa Monica Mountains NRA"

[verification]
verified = true
date = "2026-11-08"
measured_km = 107.3
difference_percent = -0.6
parts = 2
note = "Measured on the OSM relation: 107.3 km in 2 parts, 0.6% short of 108 km."