On Jul 26, 2012 11:30 PM, "Alan Mintz" <alan_mintz+...@earthlink.net> wrote:
> ref="FH nn" - USFS Forest Highway
> ref="FR nXn[n][.n]" - USFS Forest Route/Road
> ref="FT nXn[n][.n]" - USFS Forest Trail
IIRC, all three of these are a single NFD network, for National Forest Development, and are distinguishable unambiguously by whether they have two, three or more digits in their number.
At least in Region 5 (CA), the roads have N or S in the X position, while trails have E or W. However, I wasn't sure that everyone would necessarily know that, so I went with a more descriptive prefix, based on the terminology Forest Highway/Road/Trail found on the USFS site.
Road numbers in other USFS forests seem to be largely numeric, sometimes with a letter suffix. Not sure about trails. Most mentions I see are names, not numbers.
Alan Mintz <alan_mintz+...@earthlink.net>
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