[OSM-talk] Straw Poll - Disk space used by OSM photos/audio
Alex S.
maps at swavely.com
Thu Feb 14 22:54:40 GMT 2008
Jo wrote:
> Robert Vollmert schreef:
>> I believe gpsbabel supports this kind of operation:
>>
>> gpsbabel -i gpx -f raw.gpx -x
>> radius,exclude,distance=1.5M,lat=30.0,lon=-90.0 -o gpx -F filtered.gpx
>>
> Of course if you use the actual position of your house as the center of
> that radius, it would still be trivial to find where you live. That's
> why I tried to exclude points using a polygon (saved as a text file).
> This didn't seem to work though.
There was a presentation by microsoft at google concerning managing
large groups of anonymous gps traces posted here a while back. Their
result for best masking of origin was to choose a random point in a
circle up to .5km from the origin to use as the center of a 1km circle
to exclude gave the best results.
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