Hi Mark, I've posted your message on Talk page
All the best François *François Lacombe* fl dot infosreseaux At gmail dot com www.infos-reseaux.com @InfosReseaux <http://www.twitter.com/InfosReseaux> 2017-08-09 21:03 GMT+02:00 Mark Wagner <mark+...@carnildo.com>: > On Wed, 9 Aug 2017 19:13:57 +0200 > Daniel Koć <dan...@xn--ko-wla.pl> wrote: > > > Definition: > > > > Classification of waterways using "stream order" systems > > > > Proposal page: > > > > https://wiki.openstreetmap.org/wiki/Proposed_features/ > Waterways_classification > > > > This is proposition of tagging "stream order" systems only. There can > > be other systems too, but this one is simple and used in cartography, > > so it's good to have a tagging standard for it. > > Posted here because I'm tired of fighting ReCaptcha. If someone who > has *real* wiki editing privileges could put it on the wiki talk page > signed as "Carnildo", I'd appreciate it. > > None of the proposed methods of classifying waterways seems appropriate > for OSM: > > * "Classic" can be determined from an incomplete data set, which makes > it possible to add it to OSM. But by the same token, an end-user can > easily compute it from the OSM dataset, which means we shouldn't > include it. (We don't include things like the lengths of roads or > the areas of farms for exactly this reason.) > * "Strahler" and "Shreve" require a complete set of a river's > tributaries to compute. The vast majority of OSM's river networks > are incomplete, so unless a mapper has an ODbL-compatible outside > source, they can't add correct information. In the cases where the > network ''is'' complete, the same objection to the "classic" ordering > applies. > > Yes, we need a way of differentiating the Mississippi River from the > Elm River, or distinguishing a stream you can cross without breaking > stride from one where you're going to get your feet wet, but this isn't > it. > > -- > Mark > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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