GDAL NITF DRIVERMarch 12, 2020
The test nitf has two subdatasets. However, it should be noted that the file has only small overviews so it was necessary to make a read request with dramatic decimation before the overviews kick in. With this change external overviews on nitf files with or without internal jpeg or jpeg compression and with or without subdatasets should work. The problem seems to be that the stored ovr path at the time of overview creation is a local path, something like: Patch also applied in 1.
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NTF 2 4 8 gfal 32 64 then ran the script: Download in other formats: I jpeg and jpeg compressed nitf files are likely running into the same problem.
# (JP2KAK support for NITF driver) – GDAL
I have corrected the access mode in trunk r and 1. NTF the ovr path E: Small fix to jpeg handling in trunk only r Also, the overviews were built for 7 levels, but only 2 levels were actually built in the.
The original embedded jp2 image has 5 levels, which is accounted as the part of 7 levels. Closed 9 years ago.
But it still can’t find the overview. The test nitf has two subdatasets.
I assume this could arise with any of the overview-on-subdataset nirf including uncompressed multi-image nitf, netcdf, hdf4, etc.
Show comments Show property changes. The following statement in gdaldefaultoverviews. Oldest first Newest first Threaded.
# (Doesn’t use external overviews when reading NITF with JPEG compression) – GDAL
It still can’t find the newly created ovr. Also, additional vaguely related filelist related improvements r Gao, could you test this with your file? When opening the first subdataset, it goes into the “if” branch, and it can’t find the external overview file.
The problem seems to be that the stored ovr path at the time of overview creation is a local path, something like: Last modified 9 years ago. Would you mind creating a new ticket for this?
Before this I also manually edited the original. I would note that a new ticket has been setup to address the requirement to mix internal and external overviews. Opened 9 years ago Closed 9 years ago Last modified 9 years ago. Initialize poDS, pszFilename. However I have encountered a problem with multi-image jpeg compressed nitf files with finding overviews once they nitt built. I have not ported these changes into the 1. jitf
Opened 9 years ago. Let me know if problems persist. Briefly, when subdatasets are not in play, the jpeg dataset’s ovmanager can actually find the abc. As far as I can establish everything is working fine.
I do not have any multi-image jpeg encoded nitf files. See TracTickets for help on using nitd. Gao, Would you mind creating a new ticket for this?
Frank, It didn’t work for me because my.