tracking was just to identify who is potentially suspect and what exact time they've been arriving at each ballot box,
they also had millions of minutes of video recording from cameras,
knowing the exact box location and timestamp of the arrival from the GPS tracking they knew exactly which video to check to verify it.
Now imagine this:
you chose the suspected person and box location + time on the computer,
you click and watch this person's activity on the video, one after the other, all suspected moments for that person, all days recorded, each suspected arrival.
What a wonderful tool for the prosecutors. Isn't it?
That's the database they've generated after matching the two: tracking data, video data.
GPS is accurate up to couple of meters.
Don't forget 2 things:
tracking was just to identify who is potentially suspect and what exact time they've been arriving at each ballot box,
they also had millions of minutes of video recording from cameras,
knowing the exact box location and timestamp of the arrival from the GPS tracking they knew exactly which video to check to verify it.
Now imagine this:
you chose the suspected person and box location + time on the computer,
you click and watch this person's activity on the video, one after the other, all suspected moments for that person, all days recorded, each suspected arrival.
What a wonderful tool for the prosecutors. Isn't it?
That's the database they've generated after matching the two: tracking data, video data.