From: Charlotte Wolter
To: [email protected]
Sent: Monday, September 06, 2010 7:00 PM
Subject: [OSM-newbies] Help -- How to use waterway=riverbank
Hello everyone,
I've been mapping the Little Colorado River, which, despite its name,
is rather large, bank to bank. When it's not encased in a canyon--such as when
it gets close to joining the big Colorado--it's a typical Western U.S. river: a
quarter-mile wide and a foot deep. So, in the places where it is wide, I've
been mapping it as two riverbanks. However, it sometimes renders as a large
area of water, covering places that are not under water.
I know we are not supposed to map for rendering, but this result
makes me think that I am doing something wrong.
So, what is the correct way to handle waterway=riverbank? Do we join
the two banks from time to time (as I have done to try to correct the problem)?
The area I have mapped is in northern Arizona, around the towns of
Cameron and Winslow.
Thanks in advance for your help.
Charlotte Wolter
Charlotte Wolter
927 18th Street Suite A
Santa Monica, California
90403
+1-310-597-4040
[email protected]
Charlotte Just looking at
http://www.openstreetmap.org/edit?lat=35.87738&lon=-111.4111&zoom=17 .
To summarise the points which have been made already, and to add some of my
own.
Lets take, as an example, the bit of the river to the east of the bridge in
Cameron. This is currently made up of 4 ways (two long ways of the real
riverbank, and 2 which cross the river) .
You should either:
a) make all 4 ways into one way forming a closed area;
or b) add all 4 ways to a relation, each way with the role "outer" and tag the
relation with "type=multipolygon","waterway=riverbank", "name=Little Colorado
River".
In addition, ideally, there should also be a central way drawn in the direction
of the river flow, and tagged as "waterway=river"
Also where the river crosses under the bridge, the western part ,and the
eastern part should share the same small section of way, so that the two areas
butt up against each other rather than having the short section of
waterway=river between them( unless the river really does narrow at that
point).
David
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