[talk-au] Why not to change coastlines automatically to ABS data.

[swanilli]

I would be cautious about preferencing "survey" and satellite/aerial
photography data over ABS.

I have found errors in both of these. Survey data from GPS seems at times to
have been either traced pooly from gpx tracks or based on innacurate
position data, especially where there are tall objects like buildings and
hills nearby. Similarly, imagery can be misleading when there is vegetation,
like mangroves on the shore, not to mention to low resolution of the yahoo
imagery itself.


2009/10/5 Ross Scanlon <info at 4x4falcon.com>

> Just noticed this:
>
>
> http://www.openstreetmap.org/?lat=-20.34647&lon=148.95263&zoom=16&layers=B000FTF
>
> If you then go to edit and zoom in you find:
>
> Two restaurants that are now in the ocean.
> The airport road now in the ocean, this is a surveyed road and runs along
> the foreshore.
> The dam next to the airport overlapping the ocean.
> The marina disappeared totally. It's the area with the three ferry tracks
> going into it.
>
> So PLEASE look at the sat photos and already entered data before you go
> removing the coastline and using the ABS data automatically as the
> coastline.
>
> --
> Cheers
> Ross
>
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