[OSM-talk] What does WGS84 mean for openstreetmap these days?

[Simon Poole]

It's not quite the same thing as uncertainty in the datum itself.

Crust movements simply lead to things being somewhere else relative to a
global datum (aka they have moved), so a new measurement of the position
for the same object would return the correct current position and
theoretically if the original position was measured you could simply
apply a translation based on the crust movement to get the correct
current coordinates.

Am 20.12.2019 um 15:36 schrieb Jóhannes Birgir Jensson:
> Well the current issue in Iceland is a error of 50 cm between 1993 and 2016 due to crust movements. So it's less than 2 meters but more than one cm. What is your accuracy limit if 2m is just unacceptable but a centimeter is?
>
>
> 19. desember 2019 kl. 17:58, skrifaði "Greg Troxel" <gdt at lexort.com>:
>
>> Interesting about the datum history. But this is the cm strawman I
>> wasn't talking about, not the 2m issue.
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