Hi, > | I believe that they are sorted by timestamp. What they aren't sorted > | by is the track they came from so you might get points jumbled up from > | different tracks. > | > | The API deliberately tries to expose limited information about the > | points for privacy reasons as some points may have come from traces > | that are not public. > > Why expose the timestamps of private tracks. Expose the order, but > please don't expose the timing
That's exactly what happens. They are sorted by timestamp, but what's returned is only the latitude and longitude. (If I were really bent on finding out the exact timestamp of a certain GPS point, I could do a "binary search attack" by uploading a trace that contains a point in the area I'm interested in, with a timestamp of, say, 2 years ago. Then download the GPS trace and see if my point is before or after the point I am interested in. Then upload another trace with a test point one year later or earlier, and so on. I would probably have to upload about 10 points to know exactly which day the GPS point was recorded on, and 5 more to know the hour of the day. But that would really be vandalism...) Bye Frederik _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
