Hi, currently im using ENVI to work with AVIRIS data located in Sonora, México. Anyone that knows how to perform a spectral analysis for locating mineral data? I don´t have spectral field data of the area, and im having trouble with the analysis and the processes, first time using hyperspectral data and don´t know how to work with it, creating roi´s or extracting spectra for library creation. Any help will be appreciated.