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 > > > > _______________________________________________ > Talk-au mailing list > Talk-au@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-au > -- Franc
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