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A comment on Live feed from Iceland erupting volcano [video]. Parent comment

Re:Live feed from Iceland erupting volcano [video] by airhead969 on Monday March 22, 2021 @08:59AM (#26540163)
The smallest possible resolution of GPS in the horizontal is 10mm (6-7 digits) with local differential corrections.

In general, 4-5 digits is the precision to expect.

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Re:Live feed from Iceland erupting volcano [video] by jstanley on Monday March 22, 2021 @10:53AM (#26541677)
Hm, then I think my calculation that the 14th digit is worth 0.15mm must be wildly incorrect.

For a 40km earth circumference, I worked out 10^-14 * 360 * 4*10^7 = 0.00014 metres.

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Re:Live feed from Iceland erupting volcano [video] by schoen on Monday March 22, 2021 @11:25PM (#26550711)
I think you want to divide by 360 instead of multiplying by 360 - when you divide by 360, you should get the linear distance represented by one degree of latitude or longitude.
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