[talk-au] GPS accuracy

[Russell Edwards]

Hi all,

  On this topic -- for what it's worth I have written a JOSM plugin to 
help with GPS accuracy in the case of having multiple tracks covering 
the same . You can highlight a set of GPX tracks along a straight path 
(or taken from a fixed position) and it will a) average them all to find 
their geometric centre and b) find the direction of maximum variation, 
to find the likely direction of the path along which they were recorded.

I hope to have it available within the next week or two. You should get 
an accuracy improvement factor of equal to or greater than the square 
root of the number of tracks.  When you have dozens or hundreds of 
tracks on the same paths, as I do (logs from my runs around town), then 
it should be a great help in pinning down any offset in the imagery (and 
potentially, rotation, too).

Russell