[talk-au] Snapping Major regional roads to GPS traces

[Bob Cameron]

Thanks all for your comments;

- Yes I am aware of multipath phase errors, HDOP and VDOP problems etc. 
My imagery camera also has excessive averaging and interpolation, so I 
not only upload its trace but also that from a separate roof mounted GPS 
sender unit.

- Re old traces. I can "cheat" a little by also turning on the Mapillary 
layer, thus identifying the age.

- My big concern is more long straight or shallow corner roads that 
differ from reality. ie is it smart to fix (or at east reduce) the road 
error before placing new features that are relative to it. A long 
straight GPS trace probably only has a small lateral error.

- Yes I have used the DCS base maps, but unfortunately I see most 
problems in Qld.

- I am surprised by the suggestion to fix the overhead imagery instead. 
I would have assumed that OSM/ID editor references another website via 
an API by co-ordinates etc and any error correction of tiles would be on 
that site, not OSM's? Is there really an offsets database in use? I 
would expect that it would be far more important to fix errors in 
densely populated areas before rural/sparse ones though.

Cheers