On 02/09/12 10:14, Russell Edwards wrote:
GDA94 to WGS84 is approx 45 cm from what I read but it will be affected
by continental drift. GDA is fixed to points on the Australian plate so
GDA coordinates will not change (much) but I guess OSM is really meant
to be in WGS84.
Just an update to this thread in case anyone is interested, I re-did the
survey mark coordinate conversion and found it within 1 m of the bing
image. So it seems bing is correctly aligned and numerous streets in my
town are misplaced in OSM, with nearmap marked as source.
Pretty handy resource:
http://services.land.vic.gov.au/landchannel/content/SurveyMarkMarkSearch
Russell
What town?
It's interesting that the traces from nearmap are misaligned as I said
previously their guarantee was that the accuracy was within 1m.
Cheers
Ross
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