Assessing image processing techniques for geological mapping: A case study in Eljufra, Libya

N. M. Saadi, K. Watanabe

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Various image processing techniques were experimented with in this study to evaluate their efficiency for geological mapping in the Eljufra area of northwest Libya. Remote sensing data including multi-spectral optical Landsat Enhanced Thematic Mapper (ETM+), Synthetic Aperture Radar (ERS-2 SAR) and Digital Elevation Models (DEMs) extracted from the Shuttle Radar Topography Mission (SRTM) data were used to trace different lithological units as well as extracting geological lineaments in the study area. The study area is located in an arid environment mostly devoid of any vegetation. Most lithological and structural units are distinguishable based on their topographic form and spectral properties. Fusion of ETM+ and ERS-2 images was experimented with to further identify lithological units. Shaded relief techniques were implemented to enhance terrain perspective views and to extract geological lineaments. The results discriminated different rock units and modified formation boundaries and revealed new geological lineaments. Nine rock units were identified and plotted in the new geological map defined by the new boundaries. The dominant lineaments tend to run in the NNW-SSE and NNE-SSW directions. Analysis and interpretation of the lineaments provided information about the tectonic evolution of the study area.

Original languageEnglish
Pages (from-to)241-253
Number of pages13
JournalGeocarto International
Volume24
Issue number3
DOIs
Publication statusPublished - Jul 17 2009

All Science Journal Classification (ASJC) codes

  • Geography, Planning and Development
  • Water Science and Technology

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