Integration of remote sensing and geophysical data to enhance lithological mapping utilizing the Random Forest classifier: a case study from Komopa, Papua Province, Indonesia

Authors

  • Hary Nugroho Doctoral Program of Geodesy and Geomatics Engineering, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung http://orcid.org/0000-0002-2467-5876
  • Ketut Wikantika Geodesy and Geomatics Engineering Study Program, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung
  • Satria Bijaksana Geophysical Engineering Study Program, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung
  • Asep Saepuloh Geological Engineering Study Program, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung

DOI:

https://doi.org/10.15243/jdmlm.2023.103.4417

Keywords:

airborne geophysical data, lithological mapping, machine learning, random forest, remote sensing

Abstract

Lithological information is important in mineral resource exploration, geological observations, mine planning or degradation vulnerability assessment. Currently, lithology mapping can be performed in a fast, inexpensive, and easy way using remote sensing data and machine learning. Remote sensing techniques have become a valuable and promising tool for mapping lithological units and searching for minerals. Typically, the integration of remote sensing data with geophysical data provides a better diagnosis to lithological units than single-source mapping methodologies. Accordingly, this study used a combination of remote sensing and airborne geophysical data utilizing the Random Forest algorithm with small training samples to enhance lithology mapping in Komopa, Papua Province, Indonesia. Geophysical data consisting of magnetic, electromagnetic, and radiometric were added one by one gradually to the remote sensing data, which includes Sentinel 2A, ALOS PALSAR, and DEM (digital elevation model) to compare the accuracy of the classification results from each dataset. The results showed that the model that combined remote sensing data and the three types of geophysical data produced the best classification, with an overall accuracy of 0.81, precision of 0.66, recall of 0.47, and F1 score of 0.52. This fused data can increase the accuracy of the classification results by 8% overall accuracy, 6% precision, 11% recall, and 13% F1 score when compared to the model that only used remote sensing data.

Author Biography

Hary Nugroho, Doctoral Program of Geodesy and Geomatics Engineering, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung

Program Studi Teknik Geodesi, Fakultas Teknik Sipil dan Perencanaan

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Submitted

18-11-2022

Accepted

05-01-2023

Published

01-04-2023

How to Cite

Nugroho, H., Wikantika, K., Bijaksana, S., & Saepuloh, A. (2023). Integration of remote sensing and geophysical data to enhance lithological mapping utilizing the Random Forest classifier: a case study from Komopa, Papua Province, Indonesia. Journal of Degraded and Mining Lands Management, 10(3), 4417–4432. https://doi.org/10.15243/jdmlm.2023.103.4417

Issue

Vol. 10 No. 3 (2023)

Section

Research Article

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