<div><div dir="auto">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.</div></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jul 7, 2019 at 8:58 AM brad <<a href="mailto:bradhaack@fastmail.com">bradhaack@fastmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">What wiki are you looking at? At <br>
<a href="https://wiki.openstreetmap.org/wiki/Key:tracktype" rel="noreferrer" target="_blank">https://wiki.openstreetmap.org/wiki/Key:tracktype</a>, grade5 says<br>
"Soft.<br>
Almost always an unimproved track lacking hard materials, same as <br>
surrounding soil. "<br>
<br>
What if the surrounding soil is hard materials???<br>
Clearly written by someone that has not seen rocky soil.<br>
<br>
Brad<br>
<br>
On 7/3/19 2:09 AM, Mark Wagner wrote:<br>
> Option 3 won't work. Locally, tracks come in two basic types:<br>
><br>
> 1) A logging road created by a work crew with a bulldozer. Cut down<br>
> any trees, scrape off any remaining vegetation, level the road<br>
> side-to-side, and call it done. These roads range in quality from<br>
> "easily passable by a passenger car" to "high-clearance<br>
> four-wheel-drive vehicle required".<br>
><br>
> 2) A ranch road created by a truck driving the same route repeatedly<br>
> for years. These are generally fairly smooth, but the older ones are<br>
> only passable by a high-clearance truck because of the central ridge<br>
> between the tracks.<br>
><br>
> According to the wiki, these are uniformly "grade5" ("Almost always an<br>
> unpaved track lacking additional materials, same surface as surrounding<br>
> terrain."), although calling them "soft" is misleading, since the local<br>
> soil produces a rock-hard surface during the summer and fall (and a<br>
> muddy one during spring melt). They're tagged pretty much at random as<br>
> anything from "grade1" to "grade5".<br>
><br>
<br>
<br>
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