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https://openstreetmap.org/copyright | https://openstreetmap.org |
Copyright OpenStreetMap and contributors, under an open license |
trail is mapped based on gps track. boundary of the state park map is probably not accurate. There are no signs indicating the boundary between park and private property to verify
The link above is dead; a new one is https://www.parks.ca.gov/pages/539/files/PortolaRedwoodsFinalWeb2017.pdf . This map DOES show the SLATE Creek Trail, though it indicates "no public access" outside the park.
Hence, I split the path of SCT south of the park boundary and added an access=private tag (as indicated by the "circle with slash" icon on the parks map linked above). Ditto with Ward Truck Trail east of the park boundary in this vicinity. However, the park map and OSM note differing locations of WTT: park map shows an intersection with SCT inside of the park. OSM shows an intersection a couple hundred meters to the S.
I don't know if this can be fully resolved, but it should help. BTW, regarding "I believe "no public access" includes hikers. Maybe this can be resolved?
The park boundary is from CPAD 2018a data (greeninfo.org) and is believed to be quite accurate.
I have reviewed this area. The current park boundary in this area is confirmed to match the USGS topographic map and the California park map. The USGS 3D Elevation Program data confirms that there is also a visible trail crossing the park boundary. That one outside of the park boundary has been marked as unnamed because they don't match official maps. The presumed trails in the park that are visible via the USGS 3D Elevation Program data have been named to match the topographic map and the California park map.
The unnamed trails have been marked as private because they're outside of the park boundary and don't match the trails in the official maps. These trails do exist, but they don't seem to be official trails.
Please see these changesets for the details.
https://www.openstreetmap.org/changeset/142412469
https://www.openstreetmap.org/changeset/142360415