[talk-au] Boundary questions.

Franc Carter franc.carter at gmail.com
Thu Mar 5 00:10:37 GMT 2009


thinking about it now, I may have had brain fade - the bit I was looking
could have been
the Torres Islands - Whitsundays seems like ti should have good yahoo.

I'll check tonight and correct myself.

On Thu, Mar 5, 2009 at 11:01 AM, Ross Scanlon <info at 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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