Hi Even, On Tue, 16 Jan 2024 at 13:14, Even Rouault <even.roua...@spatialys.com> wrote:
> Did you try with the full path > +nadgrids=C:\OSGeo4W\share\proj\ItalyED50toWGS84_NTV2_GN.gsb ? > Yes, and I had the same problem. I have solved upgrading to 3.28.14. But I don't have what Totò wrote, it doesn't ask me to install anything. But I have the same output coordinates as gdal. > But, what is the history of this "ghost" grid that requires fetching it > from web.archive.org ? Has it had some official status, and could it be > provided under an open data license ? If so, it would be great if Italian > authorities could register to IOGP/EPSG this grid for ED50 -> WGS 84 for > Italy... Then we could ship it in PROJ-data. > > But I remember complicated discussion at FOSS4G Firenze with the guys from > the geodetic authority (https://www.igmi.org).... Not sure if that has > lead to anywhere. > Italy is not a good country: - cadastral data are not open (we only have open a not very useful WMS); - the Italian post codes polygons are not open; - we do not have official grids open. I'm using the gsb file created from the great Ernesto Sferlazza [1]. IGMI believes that it should not apply open data laws to this very general interest data. I do not know the reasons for this choice. Thank you Even an Totò [1] https://www.provincia.agrigento.it/flex/files/D.269115642901971a8757/generazione_ed_utilizzo_delle_griglie_NTV2.pdf -- ___________________ Andrea Borruso website: https://medium.com/tantotanto 38° 7' 48" N, 13° 21' 9" E, EPSG:4326 ___________________ "cercare e saper riconoscere chi e cosa, in mezzo all’inferno, non è inferno, e farlo durare, e dargli spazio" Italo Calvino
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