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/abs@.nsf/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/abs@.nsf/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.
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