[PROJ] Could you please explain me why I can't project RDN2008 (EPSG:6706) to ERTF2000 (EPSG:9067) or ITRF2000 (EPGS:8997)

[Giacomo Cappellini]

Hello,

I'm generally new to working with CRS different from EPSG:4326 + UTM and
I'm facing some issues while trying to use RDN2008, which is the official
reference system for Italy at current date.
Please excuse me if the question sounds trivial to experts, but I can't
figure out why there are no non-ballpark operations to go from/to RDN2008
and ETRF2000 or ITRF2000.

Afaik, RDN2008 is ETRS89 realization ETRF2000 epoch 2008.0.

Proj Rel. 8.2.1, January 1st, 2022

$ projinfo -s EPSG:6706 -t EPSG:9067 --spatial-test intersects --grid-check
> none --hide-ballpark --summary
> Candidate operations found: 0


$ projinfo -s EPSG:6706 -t EPSG:8997 --spatial-test intersects --grid-check
> none --hide-ballpark --summary
> Candidate operations found: 0
>

Thanks

G.C.
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