Re: [OSM-talk] Mapping rivers that flow into/through lakes?

Hi 2018-02-27 13:10 GMT+01:00 Martin Koppenhoefer : > I would facilitate things if navigable waterways are connected. > Small streams should maybe only connect to the water body (lake). > > In theory you could do waterway routing similar to how pedestrian routing > is

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

2018-02-23 11:35 GMT+01:00 Rory McCann : > But then how far do you go? Should every stream be connected to the > central river? e.g. what about here ( http://tools.geofabrik.de/osmi > /?view=water=28.57869=-16.75136=11 )? > > I would facilitate things if navigable waterways

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

I'd like to reiterate that (much like riverbanks) the shoreline of a lake can change far faster than the river channel. While the area maps the "usual" extent (ignoring droughts and floods), the line is a very useful abstraction. Not connecting rivers into a network invalidates the idea of a

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

2018-02-23 15:36 GMT+01:00 Rory McCann : > If OSM takes a "all rivers must be connected through lakes", then data > consumers have a simple job. If OSM says "some will and some won't", then > data consumers have to process the data to add intra-lake connections. If > they

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

On 23/02/18 11:58, François Lacombe wrote: If some rivers/streams shouldn't be connected, then some data consumers will have to do an automatic connection anyway. When measuring water run off and pollution, you probably want to know that "stuff going into stream X will eventually

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

On Friday 23 February 2018, Rory McCann wrote: > > But then how far do you go? Should every stream be connected to the > central river? e.g. what about here ( > http://tools.geofabrik.de/osmi/?view=water=28.57869=-16.75136 >=11 )? > > If some rivers/streams shouldn't be connected, then some data >

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

On 2018-02-23 11:35, Rory McCann wrote: On 23/02/18 06:53, Maarten Deen wrote: I see nothing wrong with those examples, I would do it the same, especially if the rivers can be sailed on by boat. Then you absolutely need the rivers to be connected to a central river (or fairway) in the lake.

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

(Sorry Rory, resent this to Talk ML) 2018-02-23 11:35 GMT+01:00 Rory McCann : > On 23/02/18 06:53, Maarten Deen wrote: > >> I see nothing wrong with those examples, I would do it the same, >> especially if the rivers can be sailed on by boat. Then you absolutely need >>

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

Hi all, Slightly off topic, but I was recently wondering if there was a waterway routing tool available? As in, I'd like to click a point in a waterway and have the downstream route plotted, presumably to the sea. It appears to me that a tool like that could be useful in this discussion? Despite

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

On 23/02/18 06:53, Maarten Deen wrote: I see nothing wrong with those examples, I would do it the same, especially if the rivers can be sailed on by boat. Then you absolutely need the rivers to be connected to a central river (or fairway) in the lake. But then how far do you go? Should every

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

2018-02-23 6:53 GMT+01:00 Maarten Deen : > On 2018-02-22 22:59, Rory McCann wrote: > > If you asked someone "Where does this river end?" they'd probably point >> to where it joins the lake. Connecting the river to the "central river" >> breaks this. And it can result in odd long

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

Greetings! I saw a nice argument somewhere about the lines for larger rivers that might be applicable here: Imagine if the water level dropped significantly - the areas would be off (but should be kept at their normal level unless the change is likely to be reasonably permanent) but the lines

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

On 2018-02-22 22:59, Rory McCann wrote: Hi mappers, What's the best way to map rivers that flow into lakes, especially when another river flows through it? Should they be connected? When a river flows through a lake, you can map a waterway=river way through it, to be "topoligcally complete".

Re: [OSM-talk] Mapping rivers that flow into/through lakes?

On Thursday 22 February 2018, Rory McCann wrote: > > What's the best way to map rivers that flow into lakes, especially > when another river flows through it? Should they be connected? > > [...] This has been discussed in the past occasionally and IIRC there was never full agreement on the

[OSM-talk] Mapping rivers that flow into/through lakes?

Hi mappers, What's the best way to map rivers that flow into lakes, especially when another river flows through it? Should they be connected? When a river flows through a lake, you can map a waterway=river way through it, to be "topoligcally complete". Or would it be better to add ways (w/o