USGS Spectral Library Version 7

The USGS Spectral Library Version 7 (Kokaly et al. 2017, Data Series 1035) is the canonical open-access collection of laboratory, field, and airborne reflectance spectra for minerals, rocks, soils, coatings, liquids, organic compounds, vegetation, and artificial materials. It is the primary reference end-member library for spaceborne mineral mapping workflows including EMIT L2B, ASTER-based alteration mapping, and EnMAP mineral abundance retrieval.