title: Discrimination between Sedimentary Rocks from Close-Range Visible and Very-Near-Infrared Images.
abstract: Variation in the mineral composition of rocks results in a change of their spectral response capable of being studied by imaging spectroscopy. This paper proposes the use of a low-cost handy sensor, a calibrated visible-very near infrared (VIS-VNIR) multispectral camera for the recognition of different geological formations. The spectral data was recorded by a Tetracam Mini-MCA-6 camera mounted on a field-based platform covering six bands in the spectral range of 0.530-0.801 µm. Twelve sedimentary formations were selected in the Rhône-Alpes region (France) to analyse the discrimination potential of this camera for rock types and close-range mapping applications. After proper corrections and data processing, a supervised classification of the multispectral data was performed trying to distinguish four classes: limestones, marlstones, vegetation and shadows. After a maximum-likelihood classification, results confirmed that this camera can be efficiently exploited to map limestone-marlstone alternations in geological formations with this mineral composition.
authors.affiliation: Department of Cartographic and Land Engineering, University of Salamanca, Polytechnic School of Avila, Avila, Spain.
authors.forename: Susana
authors.initials: S
authors.lastname: Del Pozo
authors.affiliation: Department of Geoscience and Remote Sensing, Delft University of Technology, Delft, The Netherlands.
authors.forename: Roderik
authors.initials: R
authors.lastname: Lindenbergh
authors.affiliation: Department of Cartographic and Land Engineering, University of Salamanca, Polytechnic School of Avila, Avila, Spain.
authors.forename: Pablo
authors.initials: P
authors.lastname: Rodríguez-Gonzálvez
authors.affiliation: Department of Geoscience and Remote Sensing, Delft University of Technology, Delft, The Netherlands.
authors.forename: Jan
authors.initials: J
authors.lastname: Kees Blom
authors.affiliation: Department of Cartographic and Land Engineering, University of Salamanca, Polytechnic School of Avila, Avila, Spain.
authors.forename: Diego
authors.initials: D
authors.lastname: González-Aguilera
mesh_terms: D019015:Geologic Sediments / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods