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Thanks joeloc, that's cleared up a few things for me. I agree about the mess, I come from the desktop GIS world, but the mobile mapping side is even more fragmented.
M.

in addition to GEOTIFF, and this might be easier to implement(?) and files will be smaller, how about supporting JPG + world files?

cheers
m.

I'm lucky I have a DGPS to play with :-)

 This app caught my eye as it's a co-app for Locus with some quite wild claims.

Hi,

 thought I'd share my experiences with GPS Averaging (on an HD2 running AmericanAndroid). I did some brief checks with a DGPS on survey.

 Not statistically significant, but out of 8 readings the average error was still 4.9 (range 2.7-9.7, stdev 2.2). Normal waypoints logged in Locus were 4.7 (.1-6.9, 2.3).  I wouldn't mind if the software didn't claim it was good to between 0 and 0.9.

 Also did a very quick check of precision, which you can do without a DGPS, by revisiting points. Even that is off by between 2 and 5 metres.

 What are your experiences?

Cheers
m.