[Talk-us] Destination tagging

[Harald Kliems]

I recently captured Mapillary imagery along I-90W between Madison and
Wisconsin Dells with the aim of adding destination tags to exits. The
example section of the documentation in the wiki [1] only has German signs,
which is not that useful. I'm wondering how people handle the highway
destinations commonly found on signs. For a somewhat complex example, take
this sign:

http://mapillary.com/map/im/lE5ZLUjfn-gTLB51nnh9fg

(Not that for some reason the Mapillary has an offset for the location of
the images; the actual location of the sign is about here:

http://www.openstreetmap.org/?mlat=43.10188&mlon=-89.28977#map=18/43.10188/-89.28977
)

So for the left part of the highway I tagged
destination:lanes=I 39 North;I 90 West; I 94 West;Wisconsin Dells|I 94
East;Milwaukee

For the off-ramp: destination=I 39 South;I 90 East;Janesville;Chicago

Questions:
- the wiki page seems to imply that the various interstate references
shouldn't go into the destination tag. That seems wrong to me, as I'd
expect a router to include them ("Take the exit towards I 39 South, ...")
and don't see where else they would reasonably go. The wiki (first example)
says "Additionally it is possible to set ref=A 2 on the highway=motorway."
-- not sure what that means.
- The ever-recurring abbreviation question: Do I write out "Interstate" or
not? Abbreviate north/south...? I have the suspicion in some cases that
would lead to exceeding the 255 char limit. If using an abbreviation, we
don't use a dash between I and the number, and a blank between the number
and direction, right?

Thanks for your input. In case there is consensus (one can dream!), I'm
happy to update the wiki with some more US-specific examples.

 Harald.
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