I've done GNSS localization in SF and I can't relate to what you're saying here. It's not notably more challenging than any other dense urban environment and th

I've done GNSS localization in SF and I can't relate to what you're saying here. It's not notably more challenging than any other dense urban environment and the public commercial maps (e.g. Google, Apple) have better data than they do in most cities. I saw more issues with Pittsburgh and Phoenix because they hit weird edge cases no one had foreseen than SF, which had the typical issues you expect to see in urban canyons. Plus, there are local GNSS companies testing in the bay area, so stuff tends to just work out of the box.