Hi devs, I was going to get an order of magnitude of NADCON5 transformations added in PROJ 9.2.0 (+ PROJ-data), and I found that they are not always applied. As they are datum transformations, I would assume that they are independent of the vertical system, but maybe I am wrong.
Going from WGS84(3D) to NAD83(2011) + NAVD88 height produces different horizontal values than the input (what I expected) $ echo 40 -100 0 | PROJ_NETWORK=ON ./cs2cs EPSG:4979 EPSG:6318+5703 -d 8 39.99999330 -99.99999115 25.47826194 However any other combination using 2D+vert or 3D is not changing the horizontal coordinates. $ echo 40 -100 0 | PROJ_NETWORK=ON ./cs2cs EPSG:4326+5773 EPSG:6319 -d 8 40.00000000 -100.00000000 -25.05249596 $ echo 40 -100 0 | PROJ_NETWORK=ON ./cs2cs EPSG:4979 EPSG:6319 -d 8 40.00000000 -100.00000000 0.00000000 $ echo 40 -100 0 | PROJ_NETWORK=ON ./cs2cs EPSG:4326+5773 EPSG:6318+5703 -d 8 40.00000000 -100.00000000 -0.49709511 Enabling the debug messages, the first case is clearly looking for the nadcon5 grids. The other 3 are not. Is that expected? Thanks. .___ ._ ..._ .. . ._. .___ .. __ . _. . __.. ... .... ._ .__
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