[OSM-talk] stop deleting abandoned railroads
winfixit at gmail.com
Tue Aug 25 08:12:15 UTC 2015
For what it's worth, I'm in favour of tagging dismantled railways as
Even if it does pass through newly built buildings.
2015-08-25 9:52 GMT+02:00 Paul Johnson <baloo at ursamundi.org>:
> On Sat, Aug 22, 2015 at 6:09 PM, moltonel 3x Combo <moltonel at gmail.com>
>> On 22/08/2015, John Eldredge <john at jfeldredge.com> wrote:
>> > So, if you are looking for a route without steep grades, a former
>> > railway is a natural choice.
>> Do people actually do this ?
> Yes, I do.
>> It sounds like a strawman argument to me.
>> I do a fair bit of walking and cycling, and when planing a trip I look
>> at the global topographic data but it never occured to me to look for
>> railroads. Why use the local railroad hint when you've got the global
>> DEM data ?
> DEM is great for showing large differences in elevation, but it tends to
> suffer a bit when it comes to subtle cues. Compare
> http://www.openstreetmap.org/way/14953012 ,
> http://www.openstreetmap.org/way/14939296 ,
> http://www.openstreetmap.org/way/199770540 , and
> http://www.openstreetmap.org/way/14943691 to the roughly parallel highway
> OK 11. These segments are likely (but not yet formally proposed) to be an
> extension of the Osage Prairie Trail, closing the gap from metro Tulsa to
> the capitol of the Osage Nation and a yet to be determined distance farther
> north along the former railroad. That grade, just from standard railroad
> engineering practices, is unlikely to be steeper than 2% for any
> significant distance and extremely unlikely to be steeper than 4%. OK 11,
> however, is a rollercoaster of a highway with many steep grades, some of
> which are easily past 8%. The DEM really glosses over this thanks to Tulsa
> and Pawhuska only being about 100 feet difference in elevation. The
> intervening terrain is pocked with rolling hills and cliffs formed from
> erosion, with the highest point on the highway being about 1000 feet.
> talk mailing list
> talk at openstreetmap.org
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