On 19/05/18 11:02, Andrew Davidson wrote:
On 16/05/18 07:35, Warin wrote:
Many inland waters in Australia are 'intermittent' meaning they only
flow when there is rain and that rain may only occur every 5 years or
so on average.
The vast majority of Australian stream are non-perennial. The WSJ has
a cool slider that shows this:
http://graphics.wsj.com/documents/wsj_sliders14/AustralianStreams
There are a least two problems for Australian mapping:
1. There is no OSM tag for ephemeral streams. On a stream length basis
the majority of Australian streams are ephemeral.
Some are using stream=ephemeral ... low usage.
I'd rather go with ephemeral=yes as that then can be used on 'lakes' and
other things.
2. There is no OSM tag for the end of a watercourse. This causes
problems for validators because they can't tell if a stream finishes
because the mapper gave up or the stream itself just peters out.
I did strike one stream that flowed in to a river .. at both ends!! That
had me puzzled. I tracked it back using topo information to find it went
over a saddle, so I mapped it as flowing away from the saddle on both
sides ..
As for indicating an 'end' ... maybe exit=underground on the last node ???
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