[OSM-talk] Straw Poll - Disk space used by OSM photos/audio

John McKerrell john at mckerrell.net
Sun Mar 2 10:12:43 GMT 2008


I just noticed I never posted the followup to this poll. I'll leave  
it until the end of the day so that anyone who didn't reply can do  
so, then I'll try to post something tomorrow.

John

On 14 Feb 2008, at 22:54, Alex S. wrote:

> 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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