Regarding the pipeline, it could be a bad copy-paste or garbled by
ChatGPT 😀.
I wouldn't trust ChatGPT to come with geodesic-relevant pipelines... If
you aren't really sure about what you are doing, you'd better let PROJ
infer a reasonable pipeline.
I'm also questioning the use of the grid Slovakia_JTSK03_to_JTSK to go
from JTSK03 to WGS 84, since the shift between JTSK03 and JTSK is really
small compared to the one between JTSK03 and ETRS89
$ echo 48 20 0 | PROJ_NETWORK=ON cs2cs -d 8 "S-JTSK [JTSK03]" "S-JTSK"
(uses the grid)
48.00000488 19.99999497 0.00000000
$ echo 48 20 0 | PROJ_NETWORK=ON cs2cs -d 8 "S-JTSK [JTSK03]" "ETRS89"
(uses an Helmert transformation)
47.99966528 19.99834773 0.00000000
$ echo 48 20 0 | PROJ_NETWORK=ON cs2cs -d 8 "S-JTSK [JTSK03]" "WGS 84"
(uses the same Helmert transformation as above, assuming WGS84 ~= ETRS89)
47.99966527 19.99834773 0.00000000
And more generally, people posting issues/questions written partially or
totally written by generative "IA" should really mention it to set
expectations to readers
--
http://www.spatialys.com
My software is free, but my time generally not.
Butcher of all kinds of standards, open or closed formats. At the end, this is
just about bytes.
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