Hi, can we specify overview sizes exactly? I have this odd grid that is 36000x17999, and I get consequently yucky overview sizes:
gdal_create -outsize 36000 17999 -ot Int8 -co SPARSE_OK=YES -a_srs EPSG:4326 -a_ullr 0 17999 0 36000 weird.tif gdal_translate weird.tif cog.tif -of COG gdalinfo cog.tif | grep Overviews # Overviews: 18000x8999, 9000x4499, 4500x2249, 2250x1124, 1125x562, 562x281, 281x14 Should I worry about this? Can the sizes be specified via Translate? (I can see how they could be generated externally and bundled, but I'm looking for a way at this high level). ( Maybe I shouldn't even care about the sizes ... and maybe I should resample the grid to be a better overall size, but I consider that out of scope here.) I'm comparing with other COG creators, e.g. odc which makes tidy overviews ( I will explore how it's getting done). import xarray from odc.geo.xr import assign_crs from odc.geo.cog import write_cog ds = xarray.open_dataset("weird.tif") ds = assign_crs(ds, crs="EPSG:4326") ## do something to tag it as odc write_cog(ds["band_data"], "odc.tif") os.system("gdalinfo odc.tif | grep Overviews") # Overviews: 18000x9000, 9000x4500, 4500x2250, 2250x1125, 1125x563 Cheers, Mike -- Michael Sumner Software and Database Engineer Australian Antarctic Division Hobart, Australia e-mail: mdsum...@gmail.com
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