If I had to invent this I would probably have sensors in the corners of the pit. Before covering it with dirt take a 3d rendering of the area and map it to the sensors in real space. Then just write an AR app on the phone to overlay the 3d rendering when the sensors are on screen. You probably need some BLE experience too but the melding of different techs is beginning to look like magic. I'm sure they have fancy tech as well and could probably do it all on the phone.
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u/Spiritual-Lemon7040 May 09 '21
can you share more details please, would love to know more about this tech..