Hi,
yes it should be enough for triangulation.
What happens is: The service gets the record once as an upload including
the gps position,
which will be batch processed into the real database later on.
And a second time as a search, so that you can see on the map, how it
would have looked,
before you uploaded this new positioning data to the service.
(as if someone else wanted to see, where the service estimates his position,
just without the newly added data).
That doesn't explain though why it didn't work the second time around.
To me it looks like that for some observations (not all of them) the
collected wifi aps got ignored.
Either there were not enough. (which is unlikely, since the app said
there are 10)
Or the service didn't know them, yet, so it couldn't use them for
calculating a position.
A reason for that could be geoblocking, though I think they removed that
part of the code again
(it would be good, if Hanno could shed some light on this)
There was a time, the devs thought it might help to filter out
(possibly) faked data,
by using the uploaders IP to figure out, whether the data has been uploaded
in the same country as it has been collected in
The issues with this procedure are:
- you cannot use VPNs to upload data
- you cannot roam in other countries with your home countries provider,
because often your ip will be in your home country then
- you cannot stumble on your vacations in other countries and upload
once you are at home again
Or rather you can, but the service will silently discard your uploaded
reports
(which was definitely not good, if your data has been collected
legitimately)
So the data you uploaded a few days ago, could have been ignored,
because of your ip,
and therefore it still only used previously recorded cells in the city
center
but not the collected wifi aps for estimating your position.
If the devs are interested in this, they maybe could debug, why it
doesn't work correctly for you.
If you are interested in providing some information.
Did the number of observations for your username in the statistics increase?
Are streets, that have been previously white on the map, now dotted blue?
For further debugging you could email Hanno privately the position you
stumbled
so that he could take a look at the database, whether the observations
made it into the database.
But first we should wait for his reply to my mail.
Regards,
Felix
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