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Posted by / 09-Mar-2020 06:12

Net dataset updating

An endorsement can be a few sentences that describes how NCO benefits your work or research.

E-mail your endorsement to Charlie “my surname is zender” Zender with Subject: “NCO Proposal Endorsement”. ” Yes, in 2012 NASA funded us to implement net CDF4 groups and HDF support, and in 2014 NASA funded us to improve SLD handling.

NCO aids analysis of gridded and unstructured scientific data.

The shell-command style of NCO allows users to manipulate and analyze files interactively, or with expressive scripts that avoid some overhead of higher-level programming environments.

And it's hard to sell a federal agency on the wisdom of investing in a paradigm shift!

Other more prosaic tasks that need work are, for example, I/O parallelization (!!!

To realize our grander ambition, i.e., to shift geoscience data analysis from a flat- to a hierarchical-paradigm (GODAD), will require a sustained effort and software ecosystem that understands and implement hierarchical dataset concepts.

GODAD lets the scientific question organize the data, not the ad hoc granularity of all relevant datasets.

The User Guide illustrates GODAD techniques for climate data analysis: implements a powerful domain language which handles arbitrarily complex algebra, calculus, and statistics (using GSL).

The NCO toolkit manipulates and analyzes data stored in net CDF-accessible formats, including DAP, HDF4, and HDF5.

It exploits the geophysical expressivity of many CF (Climate & Forecast) metadata conventions, the flexible description of physical dimensions translated by UDUnits, the network transparency of OPe NDAP, the storage features (e.g., compression, chunking, groups) of HDF (the Hierarchical Data Format), and many powerful mathematical and statistical algorithms of GSL (the GNU Scientific Library). The net CDF Operators (NCO) comprise about a dozen standalone, command-line programs that take net CDF, HDF, and/or DAP files as input, then operate (e.g., derive new fields, compute statistics, print, hyperslab, manipulate metadata, regrid) and output the results to screen or files in text, binary, or net CDF formats.

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The E3SM project provides the resources to implement support for parallel regridding and workflows in NCO.

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