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I’m in a park. The grass is being mown by a robot.
(lemmy.world)
We thought the rider fell off or something and it was going to crash. Then it turned and kept mowing. Park Roomba!
Another picture:
Yes, I believe the GPS ones are also guided by a wire to find edges and find their way home. The GPS is mostly for theft prevention. Won't work outside a specific area unless it's unlocked from the backend.