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A Python interface to various metadata vocabularies

Project description

Run unit tests and build Python package Coverage Status

py-thesaurus-interface

An interface to metadata vocabularies for geospatial and other geophysical data

Install

pip install https://github.com/nansencenter/py-thesaurus-interface/archive/master.tar.gz

Usage

import pythesint as pti
pti.get_gcmd_instrument('MERIS')
pti.get_gcmd_platform('ENVISAT')
pti.get_gcmd_provider('NERSC')

For JSON vocabularies, it is possible to update the local files using a specific version. The format of the version depends on the provider. If no version is provided, the latest version is retrieved.

import pythesint as pti
pti.update_gcmd_instrument(version='9.1.5')
pti.update_cf_standard_name(version='20210119T185509')
pti.update_mmd_platform_type(version='a5c8573')

or

import pythesint as pti
pti.update_all_vocabularies(versions={
    'gcmd_instrument': '9.1.5',
    'cf_standard_name': '20210119T185509',
    'mmd_platform_type': 'a5c8573'
})

Standards

The package follows the standards defined at NASA's Global Change Master Directory (GCMD) (http://gcmd.gsfc.nasa.gov) and the NetCDF-CF conventions (http://cfconventions.org/), plus possibly others that will be added as needs emerge... The standards are mapped in Python dictionaries and saved to json-files.

Directory Interchange Format (DIF)

The DIF format is a descriptive and standardized format for exchanging information about scientific data sets. The py-thesaurus-interface package provides an interface to the keywords and formats defined at GCMD.

See: Directory Interchange Format (DIF) Writer's Guide, 2015. Global Change Master Directory. National Aeronautics and Space Administration. [http://gcmd.nasa.gov/add/difguide/].

Controlled keyword vocabularies from GCMD

See: Global Change Master Directory (GCMD). 2015. GCMD Keywords, Version 8.1. Greenbelt, MD: Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL:http://gcmd.nasa.gov/learn/keywords.html

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