[talk-au] Suburb boundaries
franc.carter at gmail.com
Thu Feb 5 06:29:59 GMT 2009
The ideas I have been fiddling with over the last couple of hours actually
well for both the close-way and relation approach with just a small bit of
at the output stage. So I'm going to delay making a decision until more
and thought goes in to it.
The idea of chopping it up and making it available is a good one. I have the
sort of brain that can spot anomalies in large amounts of data so scanning
seemed 'natural' to me(1) But you are right, that would be nowhere near
(1) I did actually notice that there are problems with islands that are in
suburb as part o the mainland
On Thu, Feb 5, 2009 at 4:59 PM, Jack Burton <jack at saosce.com.au> wrote:
> On Thu, 2009-02-05 at 14:26 +1100, Franc Carter wrote:
> > I just had a conversation with a really helpful person at the ABS.
> > She indicated that the ABS is taking a view of the data that is very
> > similar/compatible with (at least my understanding) the view that
> > OpenStreetMap is taking towards the data.
> > Specifically she indicated that the ABS was not specifically concerned
> > that attribution was done in a specific manner, just that the
> > attribution was able to be found. She will put something in an email
> > so that we have an official statement.
> > So, it looks like we may well have a some valuable data to add, which
> > is good because I already spent a couple of hours working out hot to
> > import it ;-)
> That's great news!
> > There are two issues that I have come across with converting to osm:-
> > 1. What way do we want to represent the data, e.g closed ways or
> > relations consisting of borders - something else ?
> Closed ways (areas) - as that's how ABS define them, so it will make
> merging updated ABS data into the OSM Australia dataset (each time ABS
> update their dataset, which is presumably quite regularly) significantly
> > 2. The more technical problem that the boundaries are defined
> > fairly precisely (or more accurately there are lots of points defining
> > the boundaries). So the .osm file is very large - so eyeballing it in
> > josm is not going to work.
> > So I'm interested in people's suggestions of how we want to represent
> > the data and on methods we can use to sanity check the data before we
> > upload it.
> Might I suggest that trying to verify the entire set of Australian
> suburb boundaries by inspection would seem an impossible task anyway -
> wouldn't be able to "see the wood for the trees".
> For sanity checking purposes, why not split the generated OSM file up
> into a bunch of small, managable areas - then pick one you know really
> well and check it out in josm. If you're concerned that areas you don't
> know well might need checking too, perhaps put the whole lot on a
> webserver somewhere and ask on the list for other mappers to download &
> check out areas they know well too before doing the bulk upload to OSM?
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