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

[Simon Poole]

IMHO this is not what you should be doing. You should be using the GPS 
traces and possible other data to adjust the aerial/sat imagery (and 
then storing the offsets in the imagery offset DB).

The reason for this is simple, GPS traces are notoriously bad at 
capturing the actual topology of roads (that is junctions etc) and if 
they are available you will nearly always (except if they are very out 
of date, or very hilly/mountainous areas and bad orthorectification)  
want to derive the geometry from the aerial imagery.

Simon

Am 14.05.2021 um 08:23 schrieb Bob Cameron:
> Just checking if this is an okay thing to do. ie moving a major road 
> so it is centred on GPS traces - assuming there enough data for 
> accuracy (eg bidirectional, multi trace etc)
>
> The traces are probably more accurate than overhead imagery.
>
> Other features placed relative to roads will also need moving?
>
> Reason I ask is a concern that there may be an automated process that 
> adjusts existing roads.
>
> Tnx
>
>
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