[Tagging] Rivers classification
daniel at xn--ko-wla.pl
Sun Aug 6 15:30:20 UTC 2017
W dniu 06.08.2017 o 13:32, Richard pisze:
> as of rendering, respecting river width and doing something reasonable
> with intermittent flows would be a great progress.
What's the problem with intermittent flows? I'm not familiar with water
River width is a local property - it can vary lot in different places. I
need simple, synthetic measure for lower zoom levels (like
country/continent) without making any computations.
Stream order classification (or rather "waterway order" in our case) is
very good for this, but it has few different versions, mainly (according
- classic stream order (also called Hack's stream order or Gravelius'
- Strahler stream order (also Strahler number or Horton–Strahler number),
- Shreve stream order (with Hodgkinson et al.)
but also topological stream order system and probably some other too.
We should allow any of them to be used, so a general namespace should be
crafted. It could look like:
- order:classic (or order:hack or order:gravelius),
3. waterway_order:x (or stream_order:x or waterbody_order:x)
4. waterway:class:x (or waterway_class:x)
and possibly others. What do you think about it?
> Iirc the stream order issue has been brought up on some talk page
Thanks, but it's just a brief mention:
"Like a halo in reverse" [M. Gore]
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