Hello, all,
Clifford makes some very good points. In the West, particularly,
those little intermittent streams are important landmarks. Particularly
when hiking in a featureless area, such as pinyon-juniper forest, a
trail direction may say something like, "turn right after crossing the third
drainage."
And, during the summer monsoon, you want to know where they
are because they might flash flood.
The arid West has many intermittent drainages. Whatever they
are named (arroyo, stream, creek, etc.), it is important to include them.
Charlotte
At 07:56 PM 10/13/2017, you wrote:
On Fri, Oct 13, 2017 at 10:34 AM, Christoph Hormann
<<mailto:[email protected]>[email protected]> wrote:
On Friday 13 October 2017, Kevin Kenny wrote:
>
> I remain unconvinced that importing or not importing has had any
> significant impact on whether people improve the map manually.
There are a number of possible measures that could be considered for
improving old NHD imports:
* removal of unnecessary tags to reduce the baggage mappers would have
to deal with when working on the data.
* removal of small unnamed streams which are not necessary for the
overall river network connectivity in areas where the geometric
accuracy is poor by current standards (and it is therefore usually
easier for mappers to newly trace those streams instead of trying to
improve the inaccurate data)
Unnamed streams are helpful to people hiking in the forest areas by
giving a landmark for navigation. From areas I'm familiar with,
there are thousands of unnamed streams. They are unnamed because
civilization just hasn't reached it. For example, we have Logan
Creek nearby. If it was in a national forest it would most likely be unnamed.
* creating maproulette challenges for fixing inaccurate waterway
classifications - in particular waterways tagged 'waterway=stream' but
with a name containing 'Creek' or 'River' will often qualify as
waterway=river. Same for artificial waterways with 'waterway=ditch'
but names containing 'Canal' or ther other way round.
When I see creek in the name, it implies stream, at least in areas
I'm familiar with, then again that's where I usually map. I'm not
sure where you are from but I never consider telling you how to
classify something just by the name. Maproulette could be handy if
we had NHD classification differences between what's tagged in OSM and NHD.
* creating maproulette challenges for unconnected waterways.
+1
* adding missing 'intermittent=yes' to waterways in imports where this
was not properly set based on the feature codes.
+1
--
@osm_seattle
<http://osm_seattle.snowandsnow.us>osm_seattle.snowandsnow.us
OpenStreetMap: Maps with a human touch
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