[talk-au] Tracing items.
isergean at hih.com.au
Fri Jun 6 04:32:26 BST 2008
Liz <edodd at billiau.net> wrote:
> My main technical interest is whether the work in Darwin requires redoing
> there has not been an adequate georeferencing of the photogrammetry.
> (for you lot - are the streets in the right place on the ground or are we
> several hundred metres out overall)
> I can't see a problem with anyone adding from any source PROVIDED it is
> How else will we get Darwin mapped?
I was in Darwin last year sometime, and I realigned and named some of the
main roads that were traced from yahoo imagery.
My observations then, and this may have changed since, were that
* There were many road features on the map that were different to on the
* High-res imagery was generally well aligned to the GPS tracks, like it is
in most of Sydney
* The satellite imagery out of Darwin in the NT is clear, but considerably
out relative to the GPS trace (I realigned the Stuart Highway from Darwin
All the roads that I aligned to the GPS data have been noted as
source:survey. I don't know if I uploaded all of the traces though.
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