[Tagging] Way inside riverbank

Dave Swarthout daveswarthout at gmail.com
Mon Apr 20 16:14:55 UTC 2015

IMO you guys are kidding yourselves if you think most mappers actually
measure the depth of rivers before drawing in the "main stream". That would
be nice but it ain't so. Speaking for myself, as someone who has added
hundreds of rivers and streams to OSM, there isn't one for which I've
actually used "real" depth data. Cal me carelss but my feeling is, better
to get it on the map that waitinguntil I can go there in person and measure
such fine details..



On Mon, Apr 20, 2015 at 6:47 PM, John F. Eldredge <john at jfeldredge.com>

> The location of the deepest channel can change over time, as mudbanks or
> sandbanks shift position. This is why commercial vessels operating on
> rivers frequently rely upon a succession of pilots, each familiar with a
> particular portion of the river. Unless an OSM mapper has surveyed a
> portion of the river recently with a depth gauge, they would have to rely
> on possibly-out-of-date information from some other map.
> On April 18, 2015 11:32:49 AM CDT, Tobias Knerr <osm at tobias-knerr.de>
> wrote:
> > On 13.04.2015 15:06, Torstein Ingebrigtsen Bø wrote:
> > > I'm currently importing topological data of Norway to OSM. From the
> > data
> > > set we have riverbanks; however, we do not have the deepest middle
> > way
> > > as required by the wiki [1].
> >
> > As the deepest middle way is hard to identify for regular mappers, I
> > would be surprised if many people considered that a strict
> > prerequisite
> > for mapping rivers. So from my point of view, it would be acceptable
> > for
> > your import to automatically generate the way from the riverbank area
> > and upload both the way and area. This is assuming you know the flow
> > direction, which I do consider important.
> >
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> --
> John F. Eldredge -- john at jfeldredge.com
> "Darkness cannot drive out darkness; only light can do that. Hate cannot
> drive out hate; only love can do that." -- Martin Luther King, Jr.
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Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com
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