Jochem,
Digging a bit into this thread, it seems that
https://github.com/OSGeo/PROJ/pull/4036 would probably be a reasonable
starting point if you don't want to start from scratch. I see that
Thomas had some comments about potential adjustments.
(As far as not finding troublesome that software I'm involved with
doesn't do what others would it want to do, luckily I've learnt to bear
imperfection. And, trying to make me feel culprit about it is neither an
effective nor a fair strategy. I'm only likely to return on that subject
if a customer has a need for that, and with strong hesitation given how
tricky this has been!)
Even
Le 07/05/2024 à 14:23, Lesparre, Jochem a écrit :
Hi Even,
For the 3 islands of the Dutch Caribbean we have 2 islands with a
time-dependent transformation (with no geoid yet) and 1 island with a
(not yet time-dependent) transformation with a geoid. Using the 4th
component and axisswap for the height would be too confusing.
Moreover, we are going to introduce a time-dependent transformation
for the third island as soon as possible.
The combination of a 7-parameter transformation and a geoid is the
most basic transformation from an international 3D geographic CRS to a
national projected CRS and a national physical height system. Don’t
you find it troublesome that PROJ needs a workaround for that? I
really hope you will be able to choose an approach soon, even if it
isn’t entirely your taste.
Jochem
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