> So I'm thinking the output coordinate when applying "ETRS89-NLD [AGRS2010] to > ETRF2000 (1)" is at coordinate epoch 2010.5, right? Shouldn't the PROJ > pipeline +proj=set +v_4=2010.5 ?
For the transformation from ETRS89-NLD [AGRS2010] to ETRF2000 that would make sense, but for the reverse transformation you would strictly need ETRF2000 velocities of your input points to change the epoch to 2010.50. As ETRF2000 can be considered static for most applications in the Netherlands, the epoch could be set to 2010.50 in both directions in practice. However, setting the epoch is most important if you want to transform ETRS89-NLD [AGRS2010] to ETRF2000 to ITRF2020 (or reverse). In that case you need to set the epoch to the required epoch (e.g. current epoch) for the output ITRF2020 coordinates, not 2010.50. 3 Steps between ETRS89-NLD[AGRS2010] and ITRF2020@current: ETRS89-NLD[AGRS2010] <-> [email protected] (null transformation) [email protected] <-> ETRF2000@current (null transformation or based on station velocity) ETRF2000@current <-> ITRF2020@current (time-dependent transformation) Jochem Disclaimer: De inhoud van deze e-mail is vertrouwelijk en uitsluitend bestemd voor de geadresseerde(n). Gebruik, openbaarmaking, vermenigvuldiging, verspreiding en/of verstrekking van deze informatie aan derden is niet toegestaan. Op al onze producten en diensten zijn onze algemene leveringsvoorwaarden van toepassing [https://www.kadaster.nl/algemene-leveringsvoorwaarden]. Disclaimer: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient, you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. Our general terms and conditions of delivery apply to all our products and services [https://www.kadaster.com/general-terms-and-conditions]. _______________________________________________ PROJ mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/proj
