I'm pretty sure that's the case in UK, but are you willing to bet on all drains (/e.g. industrial/) of the world being lined?
On 2019-02-01 23:22, Paul Allen wrote: > On Fri, 1 Feb 2019 at 22:09, Sergio Manzi <s...@smz.it <mailto:s...@smz.it>> > wrote: > > If you think it is important to differentiate between lined vs. unlined > minor waterways (/and I'm not objecting to that/), I guess the best option > would be to use a specific tag (lined=* ?) > > As I understand it, Ordnance Survey maps in the UK make a distinction between > ditches > and drains. Of course, printed maps don't have the luxury of sub-tags, so we > don't have > to use ditch and drain just because OS does. However, ditch and drain are > already > established. > > -- > Paul
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