> > > Based on the agreed practice in Brazil, I would tag this one either as > > highway=unclassified or highway=track, depending on how much this is > > in use and what it connects (I cannot determine this from pictures > > alone) with surface=dirt or surface=ground. > > One other point I want to make. I read this sentence several times in the > above discussion and want to comment on it. Whether a highway is tagged as > unclassified has nothing to do with its surface or its usability but > depends on whether it has received a certain kind of recognition of > importance by the people who administer the roads in your area. Does it > have a route number or other designated reference number? If so it is a > classified highway and has the further characteristic of tertiary, primary, > or what have you. Here in Thailand there are many roads that are paved, > smooth, but have no designated route numbers. We tag those roads as > unclassified. So let's not confuse the issue of usability with classified > or unclassified. From the Wiki Project Thailand: > > OK, let me clarify what I wrote. The "agreed practice in Brazil" was reached after intense discussion of the mappers in the Talk-BR mailing list. The motivation was that the current scheme of OSM highway classification, based on UK highways, was nearly impossible to apply consistently here in Brazil and the situation was getting a bit chaotic.
So we agreed on a two-step classification process, first taking into account the format of the road, and afterwards and if necessary its perceived importance. In this scheme we tend to classify unpaved roads either as tertiary or as unclassified, but rarely as secondary or primary. Of course, all subject to discussion when necessary (which is the second step of classification). I am happy to say that this scheme now works quite well as usually the state of the road matches its regional importance.
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