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Machine Learning Algorithms for Automatic Lithological Mapping Using Remote Sensing Data: A Case Study from Souk Arbaa Sahel, Sidi Ifni Inlier, Western Anti-Atlas, Morocco

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Laboratory of Applied Geology, Geomatics and Environment, Faculty of Science Ben M’sik Driss El Harti, Hassan II University of Casablanca, Sidi Othman, Casablanca BP 7955, Morocco
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Laboratory of Geodynamics of Older Belts, Faculty of Science Ben M’sik Driss El Harti, Hassan II University of Casablanca, Sidi Othman, Casablanca BP 7955, Morocco
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Earth Sciences Institute (ICT) and Department of Geosciences, Environment and Land Planning, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
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Laboratory of Dynamics of Sedimentary Basins and Geological Correlation, Faculty of Science Ben M’sik Driss El Harti, Hassan II University of Casablanca, Sidi Othman, Casablanca BP 7955, Morocco
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Author to whom correspondence should be addressed.
ISPRS Int. J. Geo-Inf. 2019, 8(6), 248; https://doi.org/10.3390/ijgi8060248
Received: 12 April 2019 / Revised: 11 May 2019 / Accepted: 26 May 2019 / Published: 29 May 2019
Remote sensing data proved to be a valuable resource in a variety of earth science applications. Using high-dimensional data with advanced methods such as machine learning algorithms (MLAs), a sub-domain of artificial intelligence, enhances lithological mapping by spectral classification. Support vector machines (SVM) are one of the most popular MLAs with the ability to define non-linear decision boundaries in high-dimensional feature space by solving a quadratic optimization problem. This paper describes a supervised classification method considering SVM for lithological mapping in the region of Souk Arbaa Sahel belonging to the Sidi Ifni inlier, located in southern Morocco (Western Anti-Atlas). The aims of this study were (1) to refine the existing lithological map of this region, and (2) to evaluate and study the performance of the SVM approach by using combined spectral features of Landsat 8 OLI with digital elevation model (DEM) geomorphometric attributes of ALOS/PALSAR data. We performed an SVM classification method to allow the joint use of geomorphometric features and multispectral data of Landsat 8 OLI. The results indicated an overall classification accuracy of 85%. From the results obtained, we can conclude that the classification approach produced an image containing lithological units which easily identified formations such as silt, alluvium, limestone, dolomite, conglomerate, sandstone, rhyolite, andesite, granodiorite, quartzite, lutite, and ignimbrite, coinciding with those already existing on the published geological map. This result confirms the ability of SVM as a supervised learning algorithm for lithological mapping purposes. View Full-Text
Keywords: machine learning algorithms; Landsat 8 OLI; Sidi Ifni inlier; ALOS/PALSAR; supervised classification machine learning algorithms; Landsat 8 OLI; Sidi Ifni inlier; ALOS/PALSAR; supervised classification
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Bachri, I.; Hakdaoui, M.; Raji, M.; Teodoro, A.C.; Benbouziane, A. Machine Learning Algorithms for Automatic Lithological Mapping Using Remote Sensing Data: A Case Study from Souk Arbaa Sahel, Sidi Ifni Inlier, Western Anti-Atlas, Morocco. ISPRS Int. J. Geo-Inf. 2019, 8, 248.

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