[Talk-at] Way: 357911189

[Friedrich Volkmann]

On 06.08.19 04:40, forster at ozonline.com.au wrote:
> Way: 357911189 renders as a lake, in reality it is a scree slope/gravel bed 
> with a braided stream running through it.
> 
> It is tagged waterway     riverbank. Do you have any suggestions for better 
> tagging?

This should be micro-mapped from aerial images. You need to compare images 
from different years to see which parts of the area are frequently changing, 
and which are not.
natural=scree seems fine for most oft that area. The green parts are 
certainly natural=fell. waterway=riverbank is ok on the area around  E 
11.6636714 / N 47.0004158, which is covered most of the time by the varying 
branches of the stream.

I have never been to that region, but in general the alpine waterways carry 
a lot more water in spring and early summer due to snowmelt. You don't see 
these water levels in aerial images because they are taken when the snow is 
gone. So it's possible that waterway=riverbank is correct on a bigger area, 
but then it should be accompanied by intermittent=yes. See 
https://wiki.openstreetmap.org/wiki/Proposed_features/ephemeral for ideas 
how to specify the season.

The waterway=stream itself should be adapted to the latest aerial image. 
This may by outdated anyway, but it's still better than what is mapped by now.

-- 
Friedrich K. Volkmann       http://www.volki.at/
Adr.: Davidgasse 76-80/14/10, 1100 Wien, Austria