Spectral Data Sources

The default tests use only data/seed/lux_seed_library.json; do not make CI download large spectral databases.

Useful external sources for later importers:

• USGS Spectral Library Version 7 for minerals, soils, vegetation, and materials.
• NASA/JPL ECOSTRESS Spectral Library for vegetation, minerals, soils, and man-made materials.
• RRUFF for mineral reference spectra where its license and spectral modality fit the use case.
• Locally measured beer and kombucha calibration sets paired with lab references for SRM/EBC, pH, titratable acidity, Brix, ethanol, turbidity, and polyphenols.

When adding importers, preserve source metadata, wavelength units, instrument resolution, measurement geometry, preprocessing, and license notes.