Some transformations that used to give correct results (e.g. in PROJ 9.7.1) do no longer give results according to the official transformation (Amersfoort to ETRS89 (9)) of the Dutch national authority in PROJ 9.8.0.
I suspect it has to do with the introduction of national realisations of ETRS89 in EPSG. Complicating factor is that EPSG erroneously removed the superseded label from some outdated transformations (Amersfoort to ETRS89 (5) and Amersfoort to ETRS89 (6)). However, these old transformations have a lower accuracy than the official one, so I think PROJ should be able to still find the official transformation. Why can't PROJ find it? Is there something else wrong in EPSG, preventing PROJ to find the official transformation? Or is this an issue in PROJ 9.8.0? Jochem Example 1: Forward >From the national ETRS89 realisation to the national projected CRS, PROJ uses >the correct transformation Amersfoort to ETRS89 (9): projinfo EPSG:11037 EPSG:28992 --spatial-test intersects -o proj --hide-ballpark But from ETRF2000 and the ETRS89 ensemble PROJ doesn't use the official transformation of the national authority anymore: projinfo EPSG:9067 EPSG:28992 --spatial-test intersects -o proj --hide-ballpark projinfo EPSG:4258 EPSG:28992 --spatial-test intersects -o proj --hide-ballpark Example 2: Reverse >From the national projected CRS to the national ETRS89 realisation, PROJ uses >the correct transformation Amersfoort to ETRS89 (9): projinfo EPSG:28992 EPSG:11037 --spatial-test intersects -o proj --hide-ballpark But to ETRF2000 and the ETRS89 ensemble PROJ doesn't use the official transformation of the national authority anymore: projinfo EPSG:28992 EPSG:9067 --spatial-test intersects -o proj --hide-ballpark projinfo EPSG:28992 EPSG:4258 --spatial-test intersects -o proj --hide-ballpark 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].
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