On 25/06/19 10:47, Ian Sergeant wrote:
I'm with Andrew on this one. It sounds like your research is likely
superior to any other recent survey done in the area, and we're not
wikipedia here - we value ground truth / original research and it
would be a shame it it couldn't be mirrored in the map.
Personally, I'd change it to
waterway=no
note="blah"
because otherwise an armchair mapper will put it back (and I would
too, guilty as charged). It's ugly and non-standard, but I'd do it
anyway.
+1
I'd use life cycle tagging
abandoned/disused/whatever
disused:waterway=river
note=While present on map, it is not present on the ground - even as an
old river bed?
I too would be re entering it from the LPI data ... guilty and in error.
Really needs something in OSM to say it is not here. If it floods then
there may be a 'river' .. a seldom seen event?
Ian.
On Mon, 24 Jun 2019 at 22:52, Andrew Harvey <andrew.harv...@gmail.com
<mailto:andrew.harv...@gmail.com>> wrote:
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
<mailto: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.
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