[PROJ] OGC blog post summarising Web-mapping misalignment problem

[Roger Oberholtzer]

On Thu, Aug 22, 2019 at 3:23 PM Duncan Agnew <dagnew at ucsd.edu> wrote:
>
> I can only speak to ITRF, but the changes in this come mostly from there being longer time series and more stations. Motion
> of the Earth's center of mass is at the sub-cm level--and at this level there are actual motions of the ground that enter in, from
> loading by water changes, or by postglacial rebound. That said, if your country is all on one plate, and your national authority
> has defined a CRS moving with that plate (a plate-fixed system) then that is probably the one to use, since it maximizes the future
> relevance of a value that doesn't include an epoch.

But I'm still not 100% clear how to define my source WGS84 lat/longs
from my GNSS receiver when doing this. How best to know which WGS84 to
use? The local CRS cannot know this. Or so it seems to me.


-- 
Roger Oberholtzer