==== USGS 'Spectroscopy lab' ====

  * //**Main page:**// [[https://www.usgs.gov/labs/spec-lab]]
  * //**Short description:**// database from USGS focused on the reflectance spectra of minerals over the near UV to Near-IR (0.2-5.5µm) but also some up to 200µm
  * //**Access to data:**// [[https://crustal.usgs.gov/speclab/QueryAll07a.php|Spectral Library Version 7]]
  * //**Sample types:**// Minerals (1276), Soils and mineral mixtures (209), Coatings (12), Liquids (24), Organic compounds (360), Artificial materials (290), Vegetation and other biologic materials (286)
  * //**Spectra types:**// Reflectance spectra over the near UV to far-IR (0.2-200µm)
  * //**Search tools:**//  single field searching in Title, Category and Ranges + sorting + compare tool
  * //**Data format:**// ASCII (.txt) + separate Wavelength and Bandpass file
  * //**Preview format:**// GIF (.gif)  
  * //**Metadata:**// Sample ID, Spectrum title, Material and Type, Formula, Colection locality, Donor, Sample location, Sample description and image, XRD analysis, Composition analysis and discussion, Microscopic examination, Spectroscopic discussion, Spectral purity.
  * //**Metadata format:**// HTML (.html)
  * //**Download:**// individual zip download; The whole library can also be downloaded.
  * //**Notes:**// Full database also available convolved to various terrestrial and planetary spectrometers and multispectral imagers.