Just clueing into why you might be working with this, have you seen this critique? (was a bit shocked to see that this is apparently going forward for Sentinel 2, let alone that it was even considered!)
https://github.com/csaybar/ESA-zar-zip-decision Also glad to see a working example outlined that I can follow, Thanks! Cheers, Mike On Tue, Feb 25, 2025 at 7:10 AM Kurt Schwehr via gdal-dev < gdal-dev@lists.osgeo.org> wrote: > Thanks Laurentiu and Scott! > > I can't believe 1) I left off -r and 2) I didn't think to look at what's > in the zip. Doh! > > And thanks for reminding me about sozip. I was one of the reviewers of the > initial spec and still don't have it front-of-mind. > > unzip -l nczarr_v2.zarr.zip > Archive: nczarr_v2.zarr.zip > Length Date Time Name > --------- ---------- ----- ---- > 0 2024-12-23 02:00 nczarr_v2.zarr/ > --------- ------- > 0 1 file > > Now happily able to see the contents: > > gdalinfo /vsizip/nczarr_v2.zarr.zip/nczarr_v2.zarr > Driver: Zarr/Zarr > Files: /vsizip/nczarr_v2.zarr.zip/nczarr_v2.zarr > Size is 512, 512 > Subdatasets: > > SUBDATASET_1_NAME=ZARR:"/vsizip/nczarr_v2.zarr.zip/nczarr_v2.zarr":/MyGroup/lon > SUBDATASET_1_DESC=Array /MyGroup/lon > > SUBDATASET_2_NAME=ZARR:"/vsizip/nczarr_v2.zarr.zip/nczarr_v2.zarr":/MyGroup/lat > SUBDATASET_2_DESC=Array /MyGroup/lat > > SUBDATASET_3_NAME=ZARR:"/vsizip/nczarr_v2.zarr.zip/nczarr_v2.zarr":/MyGroup/dset1 > SUBDATASET_3_DESC=Array /MyGroup/dset1 > > SUBDATASET_4_NAME=ZARR:"/vsizip/nczarr_v2.zarr.zip/nczarr_v2.zarr":/MyGroup/Group_A/dset2 > SUBDATASET_4_DESC=Array /MyGroup/Group_A/dset2 > > SUBDATASET_5_NAME=ZARR:"/vsizip/nczarr_v2.zarr.zip/nczarr_v2.zarr":/MyGroup/Group_A/dset3 > SUBDATASET_5_DESC=Array /MyGroup/Group_A/dset3 > [SNIP] > > -Kurt > > On Mon, Feb 24, 2025 at 11:21 AM Laurențiu Nicola via gdal-dev < > gdal-dev@lists.osgeo.org> wrote: > >> I suspect it won't make a lot of difference. SOZIP is designed to allow >> seeking within a compressed file, but Zarr is tile- (block) based, where >> each of those is stored in a different file. So you end up uncompressing a >> whole file anyway. >> >> Laurentiu >> >> On Mon, Feb 24, 2025, at 21:17, Scott via gdal-dev wrote: >> > There's GDAL's sozip (Search Optimized Zip) utility as well. I have no >> > idea if it works with .zarr. I'm sure someone will correct me! ;) >> > >> > cd nczarr_v2.zarr >> > sozip ../nczarr_v2.zarr.zip . >> > sozip -l /vsizip/../nczarr_v2.zarr.zip >> > >> > On 2/24/25 10:09, Kurt Schwehr via gdal-dev wrote: >> >> Hi all, >> >> >> >> I seem to be having trouble exactly how to correctly make a zip of a >> >> zarr and how to correctly specify the vsizip url. >> >> >> >> e.g from autotest/gdrivers/data/zarr >> >> >> >> gdalinfo nczarr_v2.zarr # Works >> >> tar cf nczarr_v2.zarr.zip nczarr_v2.zarr >> >> >> >> Then what? I've tried lots of variations and not had any success. >> >> >> >> Thanks! >> >> -Kurt >> >> >> >> _______________________________________________ >> >> gdal-dev mailing list >> >> gdal-dev@lists.osgeo.org >> >> https://lists.osgeo.org/mailman/listinfo/gdal-dev >> > >> > _______________________________________________ >> > gdal-dev mailing list >> > gdal-dev@lists.osgeo.org >> > https://lists.osgeo.org/mailman/listinfo/gdal-dev >> _______________________________________________ >> gdal-dev mailing list >> gdal-dev@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/gdal-dev >> > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Michael Sumner Research Software Engineer Australian Antarctic Division Hobart, Australia e-mail: mdsum...@gmail.com
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