On 15/01/2016 11:04 PM, Marc Gemis wrote:
What about landuse=basin ? [1]
Or natural=water, water=reservoir [2]
or landuse = reservoir, reservoir_type=water_storage [3]
[1] http://wiki.openstreetmap.org/wiki/Tag:landuse%3Dbasin
"An area of land artificially graded to hold water."
This area is not graded. The area does not hold water.
[2] http://wiki.openstreetmap.org/wiki/Key:water
Not covered with water.
[3] http://wiki.openstreetmap.org/wiki/Tag:landuse%3Dreservoir
Does not store water.
This particular area has trees, shrubs. The rainfall there flows into a
reservoir.
In Hong Kong ... the area is paved ... and is fairly steep. The rainfall there
flows into some form of water storage. It also does not store water itself.
Both areas can use the term 'water catchment'. Similar to a funnel- it
'catches' fluid and sends it on to a storage device.
https://en.wikipedia.org/wiki/Drainage_basin
(This area does not 'drain to a single point' .. drains to a single area (of
water)... if there was no water there .. then yes it would drain to a single
point.)
http://www.oxforddictionaries.com/definition/english/catchment
regards
m
On Fri, Jan 15, 2016 at 12:06 PM, Warin <61sundow...@gmail.com> wrote:
On 15/01/2016 2:19 PM, Andrew Davidson wrote:
Looking at the old Parish map it would appear that it used to be part of the
State Forest until they built the Mangrove Creek Dam at which point it
became reserved for water conservation purposes.
That makes sense.
I suppose you could tag it:
boundary=protected_area
protect_class=12
Not sure what name you'd give it because the map just says "FOR WATER
SUPPLY".
landuse=water_catchment would probably be best (another new tag that I just
made up). It cannot be logged. And in some places at least the water people
don't even want walkers, let alone campers there. I think part of the Blue
Mountains National Park has restrictions like this around a water catchment
area. I think Hong Kong has areas for water catchment that are paved to
increase the run off/harvest. So there is a vast verity in what water
catchments physically are.
As I don't know what name it has .. it could be anything ... 'McPherson
Water Catchment' or 'Mangrove Creek Water Catchment' ... arrr
https://www.wyong.nsw.gov.au/getmedia/7ca695e8-748d-4bca-beba-3b7bff8296e4/Mangrove-Creek-Dam-Brochure.pdf.aspx
says 'Mangrove Creek Dam Catchment' .. so I'll go with that. No copyright on
the pdf... :-)
It does say access is restricted.. but not what the restrictions are.
-----------------------------
For those also using the LPI base Map to plot State Forests ... be carefull.
----- Original Message -----
From:
"Warin" <61sundow...@gmail.com>
To:
"talk-au" <talk-au@openstreetmap.org>
Cc:
Sent:
Fri, 15 Jan 2016 10:58:49 +1100
Subject:
[talk-au] LPI Base Map - green areas ?
Hi,
On the LPI base map green areas apear at first to be
National Parks - a darker green area that is visible at all zooms.
State Forests - lighter green, visible when zoomed in.
I have mapped out the McPherson State Forest boundary using the LPI base
map. Fine (apart from a typo in the name!). Relationship 5748137.
However when I use the 'Administration Boundaries State Forests' the
northern section I have plotted does not look to be a State Forest.
So what is this green area on the LPI base map .. when it is not a State
Forest?
I have mapped some as parks as shown by their name. And I found one
where I know it as a 'common'.
Maybe they are "miscellaneous crown lands"?
I'll reduce the relationship 5748137 to match the smaller admin boundary.
But what to do with the other green bit from the base map? I can leave
it behind with a note .. and no other tags. Would be usefull if someone
comes across it and knows what it is.
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