I think you've done a top job detailing the situation, so I'd go with your findings from on the ground.
We're not here to simply mirror the NSW LPI Base Map, so I wouldn't worry too much about what it says. On Mon, 24 Jun 2019 at 18:25, cleary <o...@97k.com> wrote: > In the past, I added some parts of the Gwydir River to the map using the > NSW LPI Base Map because I could not see a clear waterway on satellite > imagery. Since then, I have visited the area twice and cannot actually find > a river where it is shown on the map. Much of the "river" is in private > property but public roads cross waterways at various locations. > > The western end of the Gwydir River seems not to exist except on the NSW > LPI Base Map and maps which have used it as a source (including OSM). > > As far as I can ascertain, the river used to dissipate into wetlands and, > if there was enough water, the seepage from the wetlands re-formed into > waterways. However intensive irrigation has resulted in such low water flow > that the wetlands are largely dust and water seems never to flow beyond > them (except perhaps in major flood events which are relatively rare). > Water from the eastern Gwydir may flow west to the Barwon River via Carole > Creek into Gil Gil Creek, via the Gingham Watercourse and via the Mehi > River. But the so-called Gwydir River, west of the wetlands, does not > appear to exist except on the LPI Map. And part that of the waterway that > does exist is signposted by the Moree Plains Shire Council with a different > name (Big Leather Watercourse) at the two places where it crosses public > roads. GNB uses this name for another branch of the river nearer to Moree > but locals, including the local council, seem to have a different view. > > When visiting the area, I found water to be difficult to discuss with > locals as there are some strong points of view. Maintaining a river on the > map may be a political imperative for government but is not consistent with > OSM's philosophy of mapping what is actually on the ground at particular > locations. > > After reflection, I think the Gwydir River does not really exist west of > the wetlands and I think it should be deleted from OSM, even though it is > shown on the LPI Base Map. I propose to delete this section of the river > and follow the local council signposted name for the more westerly waterway > that does actually exist at Morialta and Watercourse Roads. > > I would appreciate any views on this issue. > > _______________________________________________ > Talk-au mailing list > Talk-au@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-au >
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