On Fri, 31 May 2019 at 13:14, Christoph Hormann <o...@imagico.de> wrote:
the whole waterway line with stepping across zoom levels is full of > fairly strange historic artefacts and not really well thought through. > Combined with removing minor waterways from z13 waterways are quite a > mess now. > You have my sympathies. Fixing all of that sounds very hard. However, given Andy's technique, I'm only asking you to fix a small part of it. The way ditches are handled relative to streams and rivers may not be perfect, but it's not obviously wrong (to many consumers). The way mill races and leats are treated as full-blown navigation canals (akin to rendering a ditch the same way as a river) is obviously wrong (to most data consumers). I suspect that if you ever do fix all the the waterway code to be cleaner and consistent at all zoom levels, you'd still end up with mill races being handled identically to ditches and drains. In most (technical, not tagging) ways, a mill race/leat/whatever is a subset of the class drain anyway, it's just a clarification of the purpose of the drain, in the same way that tagging its use as irrigation or flood control would be. -- Paul
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