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A comment on Facebook: The Normalization of What Should Never Have Been Accepted as Normal. Parent comment

Re:Facebook: The Normalization of What Should Never Have Bee... by dleslie on Saturday January 26, 2019 @09:12PM (#19009992)
Geo IP is a reasonable last resort; it'll usually show at least what city you're in.

The images you upload may have location data on them.

If you're using a wireless hotspot then your location is correlated to anyone who also used it while sharing GPS data.

And so on.

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Re:Facebook: The Normalization of What Should Never Have Bee... by raspasov on Saturday January 26, 2019 @10:15PM (#19010168)
"If you're using a wireless hotspot then your location is correlated to anyone who also used it while sharing GPS data."

That's a clever one I hadn't thought about. I guess for a service like Facebook/Instagram/Google it can work decently well given the scale/adoption.

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Re:Facebook: The Normalization of What Should Never Have Bee... by chrischen on Sunday January 27, 2019 @12:49AM (#19010517)
That's in fact how your GPS works most of the time. They triangulate it based on a scan of SSIDs assuming access points are usually fixed. Both Apple and Google use this method.
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