[talk-au] import of state borders?

[Michael Krämer]

2012/8/27 Ian Sergeant <inas66+osm at gmail.com>

> The first real divergence I've come across is here, where the ABS
> border follows the northern anabranch, but it seems clear from AGRI
> that the southern watercourse is now the one with the most flow.   I'd
> like to declare this land as part of NSW.
>
>
> http://agri.openstreetmap.org/?zoom=16&lat=-36.0233&lon=146.67105&layers=B00
>

Sounds reasonable to me.

In fact I also came across the first cut-offs over the weekend, an example
is [1]. But I found it rather difficult to decide for one state or the
other. According to [2] (page 2) the border does not necessarily change if
the river does: "The creation of a new channel after 1850 by sudden
avulsion will not alter the location of the state border. [...] The rule of
gradual and imperceptible erosion and accretion will apply." So I let
Victoria win there, even though I don't have any data from 1850
available....

Best regards,
Michael
----------
[1]
http://agri.openstreetmap.org/?zoom=15&lat=-34.66479&lon=142.50166&layers=B00
[2]
http://www.dse.vic.gov.au/__data/assets/pdf_file/0004/104377/NSW-VIC_Border_Determination.pdf
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