# USGS Spectral Library Version 7
*methodology . standards*

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.

## Specifications
- **version**: v7
- **authority**: usgs
- **url**: https://pubs.usgs.gov/ds/1035/
- **last verified date**: "2026-05-19T00:00:00.000Z"
- **verified by**: agency-doc
- **claim status**: agency-verified

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Source: https://eo-atlas.org/standards/usgs-spectral-library-v7
Maintainer: SpectraWorks B.V. (CC-BY 4.0)