Agreed, it's not as simple as I was hoping ;-(
cheers
On Thu, Mar 5, 2009 at 11:01 AM, Ross Scanlon i...@4x4falcon.com wrote:
In some areas the ABS data does not line up with the existing coastline
which has come from yahoo or landsat., e.g
* Yowie Bay in sydney which I assume comes from Yahoo
* The Whitsunday islands that I assume comes from landsat
Once the upload is done I am inclined align the the existing Whitsunday
Islands
to the new suburb boundary.
But what about the the yahoo based coastline - case by case based on gps
traces if available ? what about if we have no traces ?
* Yowie Bay in sydney which I assume comes from Yahoo
* The Whitsunday islands that I assume comes from landsat
Once the upload is done I am inclined align the the existing Whitsunday
Islands to the new suburb boundary.
The Whitsunday islands are PGS data.
Some sections have been aligned to Yahoo but not all.
I'd be carefull about aligning to the ABS data without looking at Yahoo or
some other sat image. The ABS data cuts across the mouth of some bays and
inlets and also extends too far up some of the inlets. Have a look at
Whitsunday Island with Yahoo imagery as the background. Part of Cid
Harbour (western side) is cut off and Hill Inlet extends all the way up
the inlet which probably should be marked as a river.
Also have a look at the area of Hamilton Island airport as the ABS data
cuts across the runway and follows the original coastline. So this data
has obviously not been updated since 1984 when the runway was built.
--
Cheers
Ross
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Franc
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