[Tagging] RFC ele:regional

[Greg Troxel]

Martin Koppenhoefer <dieterdreist at gmail.com> writes:

> Am Fr., 8. Mai 2020 um 03:22 Uhr schrieb Greg Troxel <gdt at lexort.com>:
>
>>   3) Look up the data sheet and mark it as ele:datum=NGVD29 or
>>   ele:datum=NAVD88 as it turns out.
>
> IIRR, in another mail, you wrote that the difference between these 2 is
> less than a meter, can you confirm this, or did I understand you or
> remember wrong?

Yes,it typically is.

So let me ask you again, since you keep declining to answer this:

  Please give an example of an elevation of a real thing that is
  meaningfully different in one of these "regional datums" (established
  by a country's survey agency) compared to WGS84 height above geoid.
  Identify the regional datum, and identify two values linked with a
  rigorous transformation (such as national survey agencies publish).


Thus far, you have not established that there is an actual problem that
needs to be solved.