| Autor: |
Saleem, Maryam, Naseem, Abbas Ali, Rehman, Faisal, Khan, Emad Ullah, Aslam, Bilal, Ahmad, Waqar, Azeem, Tahir |
| Zdroj: |
Arabian Journal of Geosciences; Jun2021, Vol. 14 Issue 11, p1-12, 12p |
| Abstrakt: |
The satellite remote sensing method is an important low-cost technique for the identification, mapping, and collecting information on potential areas of surface lithologies in areas of appropriate exposure. Multiple techniques have been developed which are utilized for the geological mapping from satellite data. This study is based on the band ratios and spectral analogue method for identifying and characterizing stratigraphy based on using satellite data. The study area (approx. 20 sq. km) is located in Chitral District which lies in the northwest of Pakistan. This area is based on the Devonian and Quaternary sedimentary and metamorphosed rock. ASTER data was used for the geological characterization in a way that image processed first, and then interpretation was done on the processed image. In this study, ASTER satellite data was atmospherically and radiometrically corrected before the lithological characterization. The spectral analogue method and band combination (532) in RGB image were powerful in distinguishing various rock units. Field survey was carried out to measure the accuracy of the remote sensing–based lithological maps. Accuracy of the produced map was evaluated through calculating the kappa index. Overall accuracy and a thematic accuracy of 84% were achieved for geological formations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink