Ok, thanks for the file. Here's a gist just to show you it works, I use R so I've got some checks I do around the core gdalwarp call which can be as minimal as
gdalwarp 20220902T00Z_MSC_HRDPS_HGT_SFC_RLatLon0.0225_P001.grib2 out.tif -t_srs "OGC:CRS84" You should consider the specification of the target grid yourself, with a combination of some of -tr, -ts, -te, and -t_srs arguments. Also the -r resampling argument, default is nearest neighbour. https://gist.github.com/mdsumner/d73748c44aef4a0923760401d3dc605d Cheers, Mike On Mon, Sep 5, 2022 at 5:21 PM De Juan De España, Javier < [email protected]> wrote: > Hi Mike! > > > > Thank you very much for your response. > > > > Attached you can find a grib2. Trying to test this on QGIS (Uses GDAL > behind), it automatically opens it with right projection so I guess GDAL > Will do the same. > > > > In this file, first grid point should be something like: > > > > Thank you very much!! > > > > > > *De:* Michael Sumner <[email protected]> > *Enviado el:* sábado, 3 de septiembre de 2022 8:59 > *Para:* De Juan De España, Javier <[email protected]> > *CC:* gdal-dev <[email protected]> > *Asunto:* EXT: Re: [gdal-dev] Rotated lat lon projection > > > > First step is try shoving it through the warper: > > > > gdalwarp in.nc > <https://clicktime.symantec.com/15t5ZrhtFMk6q5dh8yXpr?h=f3NsNfYLCjuppp90Nv9-oEa-gZU0oRBfBuHIbBwMVFs=&u=http://in.nc> > out.tif > > > > set lonlat extent with -te and resolution with -ts or -tr > > > > GDAL knows about projections and internal coordinate arrays and often this > is enough, the smart things come down to what output grid you define and > what resampling algorithm is used and whether it's appropriate (beware of > vector quantities for example). > > > > Use a VRT intermediate to first select out one band to test with > (gdal_translate in.nc > <https://clicktime.symantec.com/15t5ZrhtFMk6q5dh8yXpr?h=f3NsNfYLCjuppp90Nv9-oEa-gZU0oRBfBuHIbBwMVFs=&u=http://in.nc> > in1.vrt -b 1). If you have a test file I'm happy to explore. > > > > Even if the auto stuff doesn't work you can engineer a lot with just > command line args and VRT even for complex grids. > > > > Cheers, Mike > > > > On Thu, 1 Sept 2022, 23:57 De Juan De España, Javier, < > [email protected]> wrote: > > Hi! > > > > We are developping a meteorology project in the Canadian domain where we > use gdal to manage grib files. > > These *files are “rotated lat-lon” and we would like to switch to > “regular lat-lon”* easily. I’m concerned that lastest versions of gdal > can do this, but i would really appreciate some indications or information > about how to do this. > > > > Thank very much! > > > > Javier de Juan > > > > > > [image: logo-bau] > > > > > > > > *Javier de Juan de España* > > Project Manager > > Smart Society Skill Center > > Digital Hub > > Avda Europa, 18 > > 28108 Alcobendas (Madrid) – Spain > > +34 687 53 86 53 > > [image: flecha] > > WWW.ACCIONA.COM > <https://clicktime.symantec.com/15t5pMHjdCnt4v7TmejGi?h=bsqBMl9kpV7pNEC9p7lA_BzAvITG8lgP7QbVur0i_lg=&u=https://www.acciona.com/es/> > > [image: twitter] > <https://clicktime.symantec.com/15t5jX6TAb7HeyHYE6L86?h=-cIW40zXsiDGS34xBnF2qp0NFHQYcOLzae3_uhhM6P0=&u=https://twitter.com/ACCIONA> > > [image: facebook] > <https://clicktime.symantec.com/15t5uBV25pUUUrwPKD8RL?h=54T_VUKmdZlQ25O0tl3wf8KTqvyNg3vKMSd6fc0UwDU=&u=https://www.facebook.com/acciona> > > [image: link] > <https://clicktime.symantec.com/15t64qsb13qfJkbEQKvia?h=qP3wZRbx16RE2f9KqOZAFBfB0BsCiaiJdhQ6uIgX_GY=&u=https://www.linkedin.com/company/acciona> > > [image: you] > <https://clicktime.symantec.com/15t69g4sTfXFihR9wtKsC?h=smitgw2XvRmwLj9vHPFdbXjFyts7YW6yT7TAiJN1aOo=&u=https://www.youtube.com/user/interacciona1?sub_confirmation%3D1> > > [image: insta] > <https://clicktime.symantec.com/15t5z1gJYSA4tomJrmXZx?h=lsjgYLW3UgtJbbPBFBcqNBMP-9OUhZJgVLPeWqFyTaE=&u=https://www.instagram.com/acciona/> > > > > > > > > > > > > Este mensaje se dirige exclusivamente a su destinatario, y puede contener > información confidencial sometida a secreto profesional, o cuya divulgación > esté legalmente prohibida. 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If you receive this e-mail in error, please let us know > immediately (by return e-mail) and proceed to its destruction, as well as > any document attached to it. The sending of e-mails through the Internet is > not safe and, therefore, error-free communications cannot be guaranteed, as > they can be intercepted, changed, misled or destroyed or they might contain > a virus. Any user contacting us through e-mails shall be understood to be > assuming these risks. > > _______________________________________________ > gdal-dev mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/gdal-dev > <https://clicktime.symantec.com/15t5eguAhyRhF2TcgXvyU?h=Jd9BayZPGNA7ZxhvY-_xqfQhPjPrNZePw5xra7kazGY=&u=https://lists.osgeo.org/mailman/listinfo/gdal-dev> > > > > > > > > Este mensaje se dirige exclusivamente a su destinatario, y puede contener > información confidencial sometida a secreto profesional, o cuya divulgación > esté legalmente prohibida. Cualquier opinión en él contenida es exclusiva > de su autor y no representa necesariamente la opinión de la empresa. Si ha > recibido este mensaje por error, le rogamos nos lo comunique de forma > inmediata por esta misma vía y proceda a su eliminación, así como a la de > cualquier documento adjunto al mismo. El correo electrónico vía Internet no > es seguro y no se puede garantizar que no haya errores ya que puede ser > interceptado, modificado, perdido o destruido, o contener virus. Cualquier > persona que se ponga en contacto con nosotros por correo electrónico se > considerará que asume estos riesgos. > > > > This e-mail is addressed exclusively to the recipient and may contain > privileged information under a professional confidential agreement or it > may be against the law to disclose its contents. Any opinion contained in > it belongs exclusively to his/her author and does not necessarily reflect > the company’s view. If you receive this e-mail in error, please let us know > immediately (by return e-mail) and proceed to its destruction, as well as > any document attached to it. The sending of e-mails through the Internet is > not safe and, therefore, error-free communications cannot be guaranteed, as > they can be intercepted, changed, misled or destroyed or they might contain > a virus. Any user contacting us through e-mails shall be understood to be > assuming these risks. > -- Michael Sumner Software and Database Engineer Australian Antarctic Division Hobart, Australia e-mail: [email protected]
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