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Validation Approach of the Tectonic Lineament Extraction Enhancement Using Sentinel 2A Images and Modified 3 ×3 Bidirectional Prewitt Filters. Case Study: Grombalia, Tunisia

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Journal of Geographic Information System 2021年第6期13卷 671-695页

作者： mansouri karim Noamen Rebai Sonya Gannouni Slimene Sedrette Imed Riadh Farah ENSI école Nationale des Sciences de l’Informatique Manouba Manouba Tunisia Geotechnical Engineering and Georisk Research Laboratory (LR14ES03) National School of Engineering of Tunis University of Tunis El Manar Tunis Tunisia Laboratoire de Géoressources CERTE Technopole de Borj Cedria Borj Cedria Tunisia

In this study, filters are used to extract directional tectonic lineaments and, thus, to reveal the presence of faults or fractures in the satellite images. The extraction process consists first in eliminating other different types of lineaments (e.g. the lithological limit, ridgelines, hydrographic network, roads, etc.). Besides, a comparative and quantitative approach is applied to show that when the directional Prewitt filter has a zero setting of the opposite of the assumed direction, as is the case of the N-S direction, the East-West direction is also set to zero. This research work, based on a bidirectional filter (N-S;E-W), shows satisfactory results especially concerning the quantitative fluctuation of lineament directions by interval. This fluctuation is in perfect agreement with the lineaments provided by the digitizing of the different tectonic accidents directions extracted in a GIS environment from the geological map of Grombalia. In this research work, a quantitative approach was used to evaluate the result of the lineament extraction methodology based on one direction analysis and by an interval of directions. Indeed, the N45 lineament direction, well documented in the geological study of the region, was more clearly distinguished by applying the Prewitt filter than by using the Sobel filter. The result was validated by comparison with the results obtained by the digitization of the tectonic accidents mapped on the geological map.

关键词： Lineament Tectonic Accidents Bi-Directional Filter Direction Frequency Grombalia Tunisia

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A Sensor Web for Real-Time Groundwater Data Monitoring in Morocco

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Journal of Geographic Information System 2014年第6期6卷 613-623页

作者： Aniss Moumen Hassane Jarar Oulidi Meryem Agadi Mohamed Nehmadou Mohamed Ben-Daoud Amel Barich Abdelaziz Mridekh Bouabid El mansouri Said Boutaleb karim Ben Hachmi Mohammed Ali Essahlaoui Samir Eljaafari Geosciences Laboratory of Natural Resources (GeoNaRes) Faculty of Sciences IbnTofial University Kenitra Morocco Department of Mathematics Informatics and Geomatics Hassania School of Public Works (EHTP) Casablanca Morocco Laboratory of Chemical Engineering and Environment Faculty of Science and Technology Hassan II University Mohammedia Morocco Applied Geology and Geo-Environment Laboratory Faculty of Sciences Ibn Zuhr University Agadir Morocco Department of Biology Faculty of Science Moulay Ismail University Meknes Morocco Instituto Andaluz de Ciencias de la Tierra UGR-CSIC Granada Spain Water Sciences and Environmental Engineering Group Department of Geology Faculty of Science Moulay Ismail University Meknes Morocco

This article presents research and development of an interoperable platform to facilitate, monitor and coordinate groundwater data sharing. This system was orchestrated by a number of services described by Open Geospatial Consortium (OGC) such as Sensor Observation Service (SOS) and other services for the use of mapping data, Web Feature Services (WFS), Web Map Service (WMS), and catalogue services (CSW). An important activity for our project was the establishment of a portal for geographic data and services. Geoportal developed for this project will promote and facilitate access to groundwater data and share theme more openly. Otherwise our system has been designed to provide a powerful tool that enhances the ability of regional staff to monitor near real-time groundwater data (i.e.?piezometric level) and as a result will help provide a more effective response to environmental upsets.

关键词： Sensor Web OGC Geoportal Geocatalog Monitoring Groundwater Morocco

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