Lithological mapping with multispectral data–setup and application of a spectral database for rocks in the Balakot area, Northern Pakistan

• Published in: Journal of mountain science Vol. 14; no. 5; pp. 948 - 963
• Main Authors: Fuchs, Michael, Awan, Adnan A., Akhtar, Sardar S., Ahmad, Ijaz, Sadiq, Simon, Razzak, Asif, Haider, Naghmah
• Format: Journal Article
• Language: English
• Published: Heidelberg Science Press 01.05.2017; Springer Nature B.V
• Subjects: Data; Data processing; Earth and Environmental Science; Earth Sciences; Ecology; Environment; Geography; Geologic mapping; Geological mapping; Landsat; Landsat satellites; Landslides; Libraries; Lithology; Mapping; Remote sensing; Rocks; Sediment samples; Spatial data; Spectra; Stratigraphy; Surveying; Pakistan; Normalized difference index; Northern Pakistan; Spectral library; Multispectral data; Lithological mapping
• ISSN: 1672-6316; 1993-0321; 1008-2786
• DOI: 10.1007/s11629-016-4101-5

In the frame of landslide susceptibility assessment, a spectral library was created to support the identification of materials confined to a particular region using remote sensing images. This library, called Pakistan spectral library（pklib） version 0.1, contains the analysis data of sixty rock samples taken in the Balakot region in Northern Pakistan.The spectral library is implemented as SQLite database. Structure and naming are inspired by the convention system of the ASTER Spectral Library. Usability, application and benefit of the pklib were evaluated and depicted taking two approaches, the multivariate and the spectral based. The spectral information were used to create indices. The indices were applied to Landsat and ASTER data tosupportthespatial delineation of outcropping rock sequences instratigraphic formations. The application of the indices introduced in this paper helps to identify spots where specific lithological characteristics occur. Especially in areas with sparse or missing detailed geological mapping, the spectral discrimination via remote sensing data can speed up the survey. The library can be used not only to support the improvement of factor maps for landslide susceptibility analysis, but also to provide a geoscientific basisto further analyze the lithological spotin numerous regions in the Hindu Kush.