[OSM-talk] redundancy problem

[Dirk-Lüder Kreie]

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[once again to the list]

Raphael Studer schrieb:
>>> #!/bin/sh
>>>
>>> GPXNAME=`ls $1 | sed s:.gpx::`
>>>
>>> gpsbabel -i gpx -f $1 -x position,distance=5m -o gpx -F ${GPXNAME}_filtered.gpx
>>>
>> This will disproportionally amplify bad data.
>
> Could you pleace explain me, why this would amplify bad data?

If you exclude points close to each other. points that are erroneously
far out (more than the 5m) i.e. Tracks with low accuracy will be
represented far more often in the resulting data than tracks with good
accuracy.


- --

Dirk-Lüder "Deelkar" Kreie
Bremen - 53.0952°N 8.8652°E

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