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d953899559
re: https://github.com/zarr-developers/zarr-specs/issues/41 After discussions with the Zarr community, it was decided to convert to a new representation of the NCZarr meta-data extensions: version 2. These extensions store information necessary to mapping the Zarr data model to the netcdf-4 data model. The basic change is to remove the NCZarr specific objects: .nczarr, .nczgroup, .nczarray, and .nczattr. The contents of these objects is moved into the corresponding existing Zarr objects as special keys. The mapping is as follows: * ''.nczarr'' => ''/.zgroup/_NCZARR_SUPERBLOCK_'' * ''.nczgroup => ''.zgroup/_NCZARR_GROUP_'' * ''.nczarray => ''.zarray/_NCZARR_ARRAY_'' * ''.nczattr => ''.zattr/_NCZARR_ATTR_'' Backward compatibility is maintained by looking for the object ''/.nczarr'' and if found, then assuming that the dataset is in the older version 1 format. This compatibility only supports reading of such version 1 datasets. Documentation and test cases are also added. Misc. Other Changes: 1. The json parsing code was added to the general library instead of nczarr only (ncjson.c, ncjson.h). 2. Improved support for different platform paths by allowing conversion to a single common path representation. 3. Add some new error codes. 4. Modify nccopy usage to mention the new chunking specification.
34 lines
643 B
Plaintext
34 lines
643 B
Plaintext
netcdf ref_oldformat {
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dimensions:
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.zdim_8 = 8 ;
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.zdim_10 = 10 ;
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variables:
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int lat(.zdim_8) ;
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lat:_FillValue = -1 ;
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lat:lat_attr = "latitude" ;
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data:
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lat = 1, 2, 3, 4, 5, 6, 7, 8 ;
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group: g1 {
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variables:
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int pos(.zdim_8, .zdim_10) ;
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pos:_FillValue = -1 ;
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pos:pos_attr = "latXlon" ;
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// group attributes:
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:g1_attr = 17 ;
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data:
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pos =
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_, _, _, _, _, _, _, _, _, _,
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_, _, _, _, _, _, _, _, _, _,
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_, _, _, _, _, _, _, _, _, _,
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_, _, _, _, _, _, _, _, _, _,
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_, _, _, _, _, _, _, _, _, _,
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_, _, _, _, _, _, _, _, _, _,
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_, _, _, _, _, _, _, _, _, _,
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_, _, _, _, _, _, _, _, _, _ ;
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} // group g1
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}
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