[talk-au] Boundary questions.

[Darrin Smith]

On Wed, 4 Mar 2009 22:09:59 +1100
Nick Hocking <nick.hocking at gmail.com> wrote:

> 2) If a suburb follows a road or river should part of the boundary way
> be deleted and replaced with that part of the road or river.

And Franc Said:

> This is a good question - one other thing to throw in the mix is
> the relative accuracy of abs data, gps trace and yahoo imagery

At a raw point position level so far what I've seen of the ABS data
seems to line up reasonably well, it's just that the ABS data is
aligned to ABS boundaries in many cases not actual suburb boundaries.
So in many cases it's going to prove more of a guide that a hard fast
answer.

Nick Said:

> 3) How can we determine if a boundary follows the centre of the
> road/river or maybe one or other sides of it.

I think in most cases I've seen around the place in other sources the
vast majority of boundaries run down the centre of features, and that
running down one side of the other appears to be the edge case. Besides
except in the case where addressing for a street is all in one suburb
it probably makes the simplest map sense to draw it down the centre.

-- 

=b