I would think that an unimproved track across naturally solid rock or naturally well-compacted gravel would not be tracktype=grade5 - while it might be bumpy, it’s probably passable by any vehicke with sufficient clearance and tire size, even when wet, unlike a track of unimproved clay, silt or loam which requires 4wd or is simply impassable when it rains? But I’m not an expert on 4wd.
On Sun, Jul 7, 2019 at 8:58 AM brad <bradha...@fastmail.com> wrote: > What wiki are you looking at? At > https://wiki.openstreetmap.org/wiki/Key:tracktype, grade5 says > "Soft. > Almost always an unimproved track lacking hard materials, same as > surrounding soil. " > > What if the surrounding soil is hard materials??? > Clearly written by someone that has not seen rocky soil. > > Brad > > On 7/3/19 2:09 AM, Mark Wagner wrote: > > Option 3 won't work. Locally, tracks come in two basic types: > > > > 1) A logging road created by a work crew with a bulldozer. Cut down > > any trees, scrape off any remaining vegetation, level the road > > side-to-side, and call it done. These roads range in quality from > > "easily passable by a passenger car" to "high-clearance > > four-wheel-drive vehicle required". > > > > 2) A ranch road created by a truck driving the same route repeatedly > > for years. These are generally fairly smooth, but the older ones are > > only passable by a high-clearance truck because of the central ridge > > between the tracks. > > > > According to the wiki, these are uniformly "grade5" ("Almost always an > > unpaved track lacking additional materials, same surface as surrounding > > terrain."), although calling them "soft" is misleading, since the local > > soil produces a rock-hard surface during the summer and fall (and a > > muddy one during spring melt). They're tagged pretty much at random as > > anything from "grade1" to "grade5". > > > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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