Researchers at the USGS Spectroscopy Lab are studying and applying methods for identifying and mapping materials through spectroscopic remote sensing (called imaging spectroscopy, hyperspectral imaging,imaging spectrometry, ultraspectral imaging, etc), on the earth and throughout the solar system using laboratory, field, airborne and spacecraft spectrometers.
USGS Digital Spectral Libraries
Reflectance spectra of minerals, mineral mixtures, rock coatings, liquids, frozen volatiles, organic compounds, manmade materials, vegetation, and other biological materials. You can download the main spectral library
Hyperspectral Imaging Spectrometer Maps
Maps of hyperspectral imaging spectrometer data used to identify and characterize mineral deposits, vegetation, and other land surface features.