[OSM-newbies] Help -- How to use waterway=riverbank

[Charlotte Wolter]

Thanks to all, especially David, for your insight and help.

--C

At 09:11 AM 9/7/2010, you wrote:
>
>From: <mailto:techlady at techlady.com>Charlotte Wolter
>To: <mailto:newbies at openstreetmap.org>newbies at openstreetmap.org
>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
><mailto:techlady at techlady.com>techlady at techlady.com
>
>
>
>
>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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Charlotte Wolter
927 18th Street Suite A
Santa Monica, California
90403
+1-310-597-4040
techlady at techlady.com

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