[Tagging] Waterway directionality in drainage canals

2012-04-28 Thread Nathan Edgars II
It's the standard to draw a waterway in the direction of flow. I've questioned this several times, but it's an ingrained default. My question is more specific: what happens to a drainage canal that reverses direction? I offer the Everglades and surrounding agricultural land as an example.

Re: [Tagging] Waterway directionality in drainage canals

2012-04-28 Thread Volker Schmidt
Interesting question. I do have do navigable canals that can have the water flow in either direction, under operator control. I think there must be many of them. I so far have not bothered about the flow direction, as boat traffic goes both ways independently of the actual flow of the water, but

Re: [Tagging] Waterway directionality in drainage canals

2012-04-28 Thread Tobias Knerr
28.04.2012 11:24, Nathan Edgars II wrote: So there are a lot of major canals that have no fixed direction. How should these be mapped? Is there any existing scheme that can show how water flows under different conditions? We have this abandoned proposal for explicitly mapping flow directions:

Re: [Tagging] Waterway directionality in drainage canals

2012-04-28 Thread Malcolm Herring
In many European canals, the convention is for the waterway authorities to arbitrarily define a direction so that a 'left' and 'right' bank can be defined and the appropriate navigational marks installed. So in those cases, where you see red on one side and green on the other, the nominated

Re: [Tagging] Waterway directionality in drainage canals

2012-04-28 Thread Volker Schmidt
On 28 April 2012 16:14, Malcolm Herring malcolm.herr...@btinternet.comwrote: In many European canals, the convention is for the waterway authorities to arbitrarily define a direction so that a 'left' and 'right' bank can be defined and the appropriate navigational marks installed. So in those

Re: [Tagging] Waterway directionality in drainage canals

2012-04-28 Thread Alan Mintz
At 2012-04-28 02:24, Nathan Edgars II wrote: It's the standard to draw a waterway in the direction of flow. I've questioned this several times, but it's an ingrained default. My question is more specific: what happens to a drainage canal that reverses direction? I offer the Everglades and

Re: [Tagging] Waterway directionality in drainage canals

2012-04-28 Thread Paul Johnson
On Apr 28, 2012 8:43 PM, Alan Mintz alan_mintz+...@earthlink.net wrote: oneway=no would make sense, since the (unusual) default assumption for this type of object appears to be oneway=yes. It's possible that there are places where the waterway is legally restricted to travel in one direction.