AnthillOmbudsman t1_j4r7yrz wrote on January 17, 2023 at 6:28 PM

Interestingly some of this is visible on Google Street View. It's not clear to me how whoever took the pictures is getting GPS coordinates, there'd be no way to locate yourself underground.

chaossabre t1_j4rvnu0 wrote on January 17, 2023 at 8:53 PM

Inertial measurement would be adequate for some distance assuming a good GPS fix was achieved before entering.

chefjustinkc t1_j4sx1v6 wrote on January 18, 2023 at 12:59 AM

This is google were talking about