[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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