Rather ironically I'm about half a dozen suburbs from completing Sydney. When
I started other people had done about 25% of the suburbs and I carried on with
their approach of using the existing OSM map features that corresponded to the
boundaries which are mostly streets, property boundaries and waterways. (Let me
tell you I've see quite a large number of Sydney backyards ;-) ) I'd been using
the ABS2011 as the basis for this but I had been checking with the NSWLPI stuff
to see where they differed. I'd say that the ABS stuff was about 80-90%
accurate with a few suburbs having very different boundaries and there being a
number of new suburbs created since 2011. The interesting thing about the
NSWLPI boundaries is that they don't always appear to be correct either (ie:
boundaries obviously following streamlines but not lining up the the streams,
probably because the data comes from a number of upstream data sources of
varying accuracy) and that they have a lot of fine detail in them (ie: the
suburb boundary jumping from one side of the street to the other or detouring
up a walk way and back again, or passing straight through buildings).
So there is a lot of interpretative work that went into putting these into OSM.
What I quickly learnt was that the state of the OSM map in Sydney is pretty
poor at the moment. It looks OK from low zoom levels but once you go in you
discover that there are entire suburbs with no street names and that the street
tracing is pretty rough in places. I'm guessing the problem has been that some
of the early stuff was traced from NearMaps and the later stuff is from Bing.
On Sunday, 6 December 2015, 9:14, cleary <[email protected]> wrote:
I have approached the NSW Government and have received permission for
OpenStreetMap to use specified data from Land and Property Information
NSW.
I have added the appropriate attribution in the Contributors page of the
wiki under New South Wales Government data and it includes a link
("explicit permission") to a transcription of the correspondence
received, so that the details of the specified permission and requested
attribution can be scrutinised.
I do not have the skills to import whole datasets safely but it is my
intention to utilise individual items of data where I can do so when
editing OSM. I also recognise the dangers in importing data on a
wholesale basis, for example the official NSW suburb boundaries (as
shown in LPI data) are not the same as the ABS approximations which have
already been included in some places and there would be scope for
serious conflict of data if this particular LPI dataset were to be
imported without a lot of care.
Is there anything else that needs to be done in regard to appropriate
publication of permission in the wiki?
I trust other users editing the New South Wales map will be interested
in this new (and very rich) source of data.
_______________________________________________
Talk-au mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/talk-au
_______________________________________________
Talk-au mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/talk-au
