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[mat-wg] suggestions for atlas service
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Piotr Strzyzewski
Piotr.Strzyzewski at polsl.pl
Wed May 18 11:43:18 CEST 2011
On Fri, May 13, 2011 at 11:56:01AM +0200, Robert Kisteleki wrote: > > 2. Better probe location display. Currently I host two probes, both 10cm > > one from each other, put into two different ASes. When I have put > > exactly the same geo data, the "display" mechanism put one of it onto > > the other one. > > This is a tricky one. > > Background information: we'd rather not publish the exact geo-coordinates > the hosts put in, because of privacy concerns. So what we do now is that > whenever we display probes on a map, we round the geo-coordinates to two > digits. This introduces a "random" error of up to 1000 meters or so. (If you > zoom in on Amsterdam, where we have enough probes, you'll see that all > probes are aligned into a neat, sparse matrix; it's because of this.) It seems to be relatively easy to round the geo-coordinates to two digits (as you do it right now) and then add some random number from 0.00000 to 0.00999 to it. Piotr -- gucio -> Piotr Strzyżewski E-mail: Piotr.Strzyzewski at polsl.pl
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