I do a lot of waterway mapping where I do not know initially which way the river flows and wanted a way marking them when verified. I came up with experimentally marking them with oneway=yes ... Seems logical to extend that with oneway=no for tidal estuaries?
Mike On 12 Sep 2013, at 03:22, rem zamora <pompy...@gmail.com> wrote: > Good idea Jim. > > However it got me thinking also... in the case of Pasig river, the flow of > the water depends on the time and tide of the day. Sometimes water flows > inward from the bay to Laguna lake but there are times also that the water > flows from the lake to the ocean (which is what seems to be natural to me, > all water flows toward the ocean). > > Just a thought. This is the same case also in Malabon and some parts of > Bulacan also :) > > On Sep 12, 2013 9:42 AM, "Jim Morgan" <j...@datalude.com> wrote: > On Thursday, 12 September, 2013 09:31 AM, maning sambale wrote: > In some cases, we had to switch the way direction to follow the the > convention [0] that the "direction of the way should be downstream > Hah, I'd never really thought of this before. I guess a lot of times I start > tracing from the sea backwards inland, so I've probably got this wrong a few > times. > > It started me thinking though. If you were able to get the elevation data for > the start point and end point of a waterway, you could probably work out the > direction of flow from that, and apply it automagically. > > So what about canals? :-) > > Jim > > _______________________________________________ > talk-ph mailing list > talk-ph@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-ph > _______________________________________________ > talk-ph mailing list > talk-ph@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-ph
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