It's not location data directly, but instead some measurements. I'm not sure how precise the location will be that Google obtains about you. All I know is that

It's not location data directly, but instead some measurements. I'm not sure how precise the location will be that Google obtains about you. All I know is that the name of the protocol is called SUPL, and the domain it connects to is supl.google.com. You can see it written here in a config variable, e.g. for lineage OS: https://github.com/search?q=org%3ALineageOS+supl.google.com&type=code https://github.com/search?q=org%3ALineageOS+supl.google.com&... These are some links with reading about SUPL (I haven't read them): https://docs.broadcom.com/doc/1211168566155 https://docs.broadcom.com/doc/1211168566155 http://dx.doi.org/10.1109/ASMS.2008.46 http://dx.doi.org/10.1109/ASMS.2008.46 https://www.openmobilealliance.org/release/supl/V2_0-20120417-A/OMA-AD-SUPL-V2_0-20120417-A.pdf https://www.openmobilealliance.org/release/supl/V2_0-2012041... There is a second network service for AGPS that connects to qualcomm hosted gpsonextra.net, but that IIRC just downloads a bunch of binary blobs with satellite data inside. It's not an interactive service where you send your position to it. You can find gpsonextra.net in the same gps.conf files that you can find SUPl URIs too.