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I was living in Sydney a couple years ago and frequently found GPS/Google Maps to be a lot less reliable on my phone compared to Canada. It would frequently jum
by tobyjsullivan 6y ago
I was living in Sydney a couple years ago and frequently found GPS/Google Maps to be a lot less reliable on my phone compared to Canada. It would frequently jump over a street or say I'd taken a turn which I hadn't. I assumed this had something to do with a more dense city, bigger buildings, etc.
Then one day, they moved the official location of the city[0] and, as far as I can tell, the problem went away overnight.
[0] https://www.smh.com.au/national/nsw-and-victoria-just-jumped-1-8-metres-north-20200102-p53ocx.html https://www.smh.com.au/national/nsw-and-victoria-just-jumped...
- jiggawatts 6y agoIt's more than just that! The Australian plate is moving so fast that calculations relative to GPS coordinates need to factor in the current date. All other plates are moving slowly enough that this can be ignored, so of course... it's ignored by map vendors. They all use fixed, static coordinates with any temporal effects factored in.
- medmunds 6y agoWow, TIL. Plate movement is mentioned in the original article, but more detail on how Australia is dealing with "drifting at about seven centimetres a year to the northeast" here [2017]: https://theconversation.com/australia-on-the-move-how-gps-keeps-up-with-a-continent-in-constant-motion-71883 https://theconversation.com/australia-on-the-move-how-gps-ke...
- deleted 6y ago[deleted]