FYI, Franc was kind enough to let me have a copy of his original Perl
import script. Email me if you want a copy. However, and I think Franc
would agree, I understand it has really been superceded by the
capabilities of ogr2osm. Emilie Laffray said to me in email, "If it is
done properly (and data is good), ogr2osm would remove duplicate nodes,
merges ways etc... A little inspection of data should provide us this."
On the discussion of whether it is actually a good idea, my mild
suggestion, (I am no longer based in Australia), is that OpenStreetMap
schema and so on is becoming stable enough to think about having
separate layers outside the main database. This might well suit the
suburbs boundary case. Perhaps one as an as is "official" layer and one
as a community-edited version.
Mike
On 19/09/2012 11:17, Andrew Harvey wrote:
Hi Ken,
On 19/09/12 11:57, Ken Self wrote:
In doing a manual load I am ensuring the boundaries share common
boundaries
with one another and the multipolygons close off properly. Those are pretty
much impossible to do with an automated load. Even a few manual errors creep
in but they are easily fixed.
As I understand it from the ABS website
http://www.abs.gov.au/ausstats/[email protected]/0/a9421cdfb258e4a4ca2570ad00818509?o
pendocument they are supposed to be the gazetted boundaries
... that document is for the 2006 census boundaries.
For the 2011 ASGS, the Non-ABS structures data is at
http://www.abs.gov.au/AUSSTATS/[email protected]/DetailsPage/1270.0.55.003July%202011?OpenDocument
With the documentation at
http://www.abs.gov.au/AUSSTATS/subscriber.nsf/log?openagent&1270055003_oct%202011.pdf&1270.0.55.003&Publication&469CDA45CE2B94CCCA257937000D966F&&July%202011&31.10.2011&Previous
it states that the LGA boundaries which form part of the ASGS 2011, "are
an ABS approximation of officially gazetted LGAs as defined by each
State and Territory (S/T) Local Government Department."
Which is good enough for most purposes, and a good starting point for
later corrections.
I suppose that raises an interesting point, that in true OSM spirit if
on the ground data indicates an area is LGA X (eg. street sign
branding), but the "official" gazetted boundaries say otherwise, OSM
should primarily contain what's on the ground, rather than the
"official" one.
Again quoting from that document, the suburb boundaries which form part
of the ASGS 2011, "are an ABS approximation of localities gazetted by
the Geographical Place Name authority in each State and Territory (S/T).
Since 1996 these boundaries have been formalised for most areas of
Australia through a program coordinated by the Committee for
Geographical Names in Australasia (CGNA) under the umbrella of the
Intergovernmental Committee On Surveying and Mapping (ISCM). SSCs are
built from Statistical Area Level 1 (SA1) that, singly or in
combination, form an approximation of Gazetted Localities."
The question is what to use as a definitive source for corrections that is
ODBL compliant. I've found some maps on
http://www.vec.vic.gov.au/publications/publications-maps.html#5 but not sure
if we can use them to make corrections in OSM to the ABS boundaries.
No you cannot gather information from those maps and transfer it into OSM.
Those maps are Copyright All rights reserved. And the golden OSM rule is
don't copy from other maps unless they are released under a compatible
license.
_______________________________________________
Talk-au mailing list
[email protected]
http://lists.openstreetmap.org/listinfo/talk-au
