Hello, gang.

TL;DR: I want advice on the tagging scheme illustrated here: 
http://iconocla.st/hot/so/roads_translation.txt

I am ready to import the ~28k road segments we have from MadMappers for Somalia 
that are more than 500m from an existing OSM road, as discussed in previous 
emails.

  http://lists.openstreetmap.org/pipermail/imports/2011-August/001055.html
  http://lists.openstreetmap.org/pipermail/hot/2011-August/000897.html 
  
Most roads in Somalia are unpaved, even the major ones; therefore, with the 
very little attribute data we have, it is hard to know exactly how to tag the 
roads. I have taken some educated guesses on the tags generated by the ogr2osm 
translation step, and would really like feedback before I proceed with the 
import.

  http://iconocla.st/hot/so/roads_translation.txt

If a road is a "major road" or even an ordinary "road" but unpaved, do we still 
regard them as "primary" or "secondary"?

We have learned from a number of sources that the "geological tracks" in the 
dataset are graded tracks made by geological surveys, with very little in the 
way of maintenance. We have confirmed their existence via ground imagery, but 
we were cautioned to regard them as extremely unreliable in terms of road 
surface quality; hence they are getting tagged "tracktype=grade5".

Any insights anyone can offer would be most welcome. Thank you!

SDE
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