[OSM-newbies] GPS accuracy

[Jeffrey Martin]

I went to Seoul Saturday on the bus and I have issues with accuracy.

The satellite screen sometimes showed 11 meters or more. Is this kind
of data useful?

I noticed after going through a tunnel that the accuracy would jump to
30 m when we
exited, but on the mapping screen it didn't look like it was off that much.

Walking in the city I sometimes got severe canyon effect.

What strategies should I use in dealing with this kind of variable data?

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