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Those who've followed my conversations closely on talk-au will know that the DCDB geography is not always anchored to GPS - it's more concerned with the relationships between immediate parcels.
Anyway I've discovered another area - Kilcoy.
In my opinion the DCDB is about 8-10 metres south of where it "should" be given the GPS traces in the area. Fire up your copy of JOSM and see if you agree.
Note to self: Ask Queensland DERM how it wants to handle "bug reports" of this nature.
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تعليق من JohnSmith في 8 أكتوبر 2009 في 16:13
I don't see a big problem with Kilcoy, I can't find any traces I made going through Kilcoy but if you download the existing GPS traces the boundaries are "within tollerance" imho.
Also roads don't go down the centre of the gaps between boundaries, this is just area allocated for roads, but the roads can be anywhere within that area.
So far the only real error I've seen is in Gympie and the local council is most likely to blame for not updating boundaries when they realigned the road way on one small section of road.
تعليق من imroy في 11 أكتوبر 2009 في 15:38
The discrepancies are interesting. Perhaps the positions are made in relation to the Australian Geodetic Datum (AGD66). Australia is moving north-ish at something like 5-7 cm a year, but it would take well over 100 years to move 8-10 m. So I'm not sure what could be causing it. Maybe it's just laziness or sloppiness.