On 2015-06-13 17:08, Harald Kliems wrote:
Very nice, Richard! One quick comment: I might not be the only who
doesn't always change the tiger:reviewed tag when fixing TIGER-imported
roads. I don't know if that's technically feasible, but maybe it would
be better to check if a way has been modified since import, independent
of the tiger:reviewed tag. I guess you could assign those a slightly
lower priority than the ones that have tiger:reviewed=yes.
You aren't alone. I stopped bothering with tiger:reviewed tags back in
the Potlatch 1 days. It just isn't a well-designed tag:
- not very discoverable to mappers who weren't around in 2008
- not automatic enough
- doesn't say whether the names, classification, or geometry was
reviewed, or whether the review covered the entire way
I think we generally treat tiger:* tags as cruft these days. (I
sometimes use tiger:name_* in cleaning up erroneously merged ways or
ways lossily "unduplicated" along county lines, but that's about it.)
On the other hand, ways without tiger:reviewed tags are more likely to
have been entered by hand or rigorously reviewed, so it does make sense
to reward such ways. But I think it'd be unfortunate to totally discount
tiger:reviewed=no ways.
FWIW, I also leave a lot of usable paved roads as highway=residential in
rural areas, but there are plenty of considerations that vary from
region to region (even within a state).
On Sat, Jun 13, 2015 at 1:38 PM Richard Fairhurst
<rich...@systemed.net
<mailto:rich...@systemed.net>> wrote:
Hi all,
At State of the Map US last weekend I was really pleased to unveil
bicycle routing for the US (and Canada) at my site, cycle.travel
<http://cycle.travel>.
The planner, at http://cycle.travel/map , will plan a bike route for you
between any two points - whether in the same city or on opposite sides
of the continent. It's all based on OSM data but also takes account of
elevation and other factors.
I "dogfooded" it with a three-day ride around New York state after
SOTM-US, and it found me some lovely quiet roads in and around the
Catskills. I hope it'll be equally useful for the other two-wheelers
amongst us. There's still a lot I want to add (as detailed at
http://cycle.travel/news/new_cycle_travel_directions_for_the_us_and_canada)
but I hope you enjoy it.
Plug aside, there's a couple of things might be relevant to US mappers.
First of all, I'm aiming high with this - the aim isn't just to make the
best OSM-powered bike router of the US, but the best bike router full
stop for commuters, leisure cyclists and tourers. (I leave the
"athletes" to Strava!)
Here in Britain, experience over the years has been that good bike
routing and good bike cartography - historically via CycleStreets and
OpenCycleMap - are a really effective way of driving contributions to
OSM. So if you know cyclists who aren't yet contributing to OSM, maybe
throw this at them - and if it doesn't find the route they'd recommend,
maybe there's some unmapped infrastructure they could be persuaded
to add!
Second, the routing and cartography both heavily distrust unreviewed
TIGER.
In other words, it won't route over a rural road tagged as
highway=residential
tiger:reviewed=no
Any road with tiger:reviewed removed or altered, any road in urban
areas, and any road with highway=unclassified or greater is assumed to
be a usable paved road. (There are a few additional bits of logic but
that's the general principle.)
Unreviewed rural residentials are shown on the map (high zoom levels) as
a faint grey dashed line, explained in the key as "Unsurveyed road".
I've been finding this a really useful way of locating unreviewed TIGER
and fixing it... it's actually quite addictive. :) Looking for roads
which cross rivers, or with long sweeping curves, is an easy way of
identifying quick wins. My modus operandi is to retag 2+-lane roads with
painted centrelines as tertiary, smaller paved roads as unclassified,
and just to take the tiger:reviewed tag off paved residential roads.
Anything unpaved gets a surface tag and/or highway=track.
I can't promise minutely updates I'm afraid - the routing/map update
process takes two full days to run so it'll be more monthly than
minutely. But I hope you find it as useful as I do. You'll see there's a
tiny little "pen" icon at the bottom right of http://cycle.travel/map
which takes you to edit the current location in OSM.
Finally, many thanks to everyone who's tested it so far, particularly
Steve All - your feedback was and continues to be enormously useful.
cheers
Richard
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