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Safa Ridene¹ , Reda Yaagoubi¹, Imane Sebari¹, Audrey Alajouanine²
Revue Internationale de Géomatique, Vol.29, No.3, pp. 241-253, 2019, DOI:10.3166/rig.2019.00091
Abstract While shadow can give useful information about size and shape of objects, it can pose problems in feature detection and object detection, thereby, it represents one of the major perturbator phenomenons frequently occurring on images and unfortunately, it is inevitable. “Shadows may lead to the failure of image analysis processes and also cause a poor quality of information which in turn leads to problems in implementation of algorithms.” (Mahajan and Bajpayee, 2015). It also affects multiple image analysis applications, whereby shadow cast by buildings deteriorate the spectral values of the surfaces. Therefore, its presence causes a deterioration in the visual… More >

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Chamseddine Zaki¹ , Mohamed Ayet^1,2, Allah Bilel Soussi²
Revue Internationale de Géomatique, Vol.29, No.3, pp. 255-262, 2019, DOI:10.3166/rig.2019.00086
Abstract A conceptual spatiotemporal data model must be able to offer users a semantic richness of expression to meet their diverse needs concerning the modeling of spatio-temporal data. The conceptual spatiotemporal data model must be able to represent the objects, relationships and events that can occur in a field of study, track data history, support the multirepresentation of these data, and represent temporal and spatial data with two and three dimensions features. The model must also allow the assignment of different types of constraints to relations and provide a complete orthogonality between dimensions and concepts. The MADS model meets several requirements… More >

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Wided Batita
Revue Internationale de Géomatique, Vol.29, No.3, pp. 263-285, 2019, DOI:10.3166/rig.2019.00092
Abstract The emergence of Web 2.0 is materialized by new technologies (APIs, Ajax, etc.), by new practices (mashup, geotagging, etc.) an, by new tools (wiki, blog, etc.). It is primarily based on the principle of participation and collaboration. In this dynamic, the web mapping with spatial character or simply called Geospatial Web (or Geoweb) evolves by strong technological and social changes. Participatory GeoWeb 2.0 is materialized in particular by mashups among wikis and géobrowsers (ArgooMap, Geowiki, WikiMapia, etc.). The new applications resulting from these mashups are moving towards more interactive forms of collective intelligence. The Geodesign is a new area, which… More >

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Ali Chaieb, Noamen Rebai
Revue Internationale de Géomatique, Vol.29, No.3, pp. 287-296, 2019, DOI:10.3166/rig.2019.00082
Abstract The geomorphology of the Htab river watershed is mainly guided by the action of the E-W Kasserine fault. This activity influenced the installed hydrographic system. To see the impact of neotectonic on the Htab river watershed, four morphometric indices were applied: the elongation ratio, the hypsometric curve, the hypsometric integral, and the asymmetry factor. The processing and calculation of these indices were based on global DEMs (Digital Elevation Models). The result obtained shows an important link between the activity of the Kasserine fault, the geomorphological behavior of the Htab river watershed and the hydrographic network. Field observations confirmed well these… More >

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Rabii El Hamzaoui, Ahmed Raissoun, Amal Ouahi, Abdelkrim El Arri
Revue Internationale de Géomatique, Vol.29, No.3, pp. 297-315, 2019, DOI:10.3166/rig.2019.00083
Abstract Tangier-Assilah prefecture coast, situated in the furthest north-west of Morocco Kingdom constitutes an important attraction center for many socioeconomic activities and shelters an environmental varied rich and vulnerable patrimony.The integrated management of this complex space involves a thorough knowledge of its functioning and evolution, themselves are reliant on several physical socioeconomic and statutory factors, which interact at different spatiotemporal scales. And for such a purpose, the GIS represents an adequate implement for collecting, managing, processing and spreading abroad a huge amount of diverse sources and natures data.The aim of this current work is the implementation of a coastal Geographic Information… More >

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Nadia Trabelsi, Imen Hentati, Ibtissem Triki, Moncef Zairi
Revue Internationale de Géomatique, Vol.29, No.3, pp. 317-338, 2019, DOI:10.3166/rig.2019.00087
Abstract The Sfax phreatic system is an important source of water supply. The latter is constantly threatened by nitric pollution. In order to protect this aquifer, a study of the intrinsic vulnerability has been carried out using the SI (Susceptibility Index) method. The model takes into consideration the various vulnerability criteria governing the process of contaminant transfer. These are geological, hydrogeological, land use, topography, and meteorological factors. In this study, a method derived from the SI model is presented (modified SI). The model is based on an approach that integrates hydrological modeling under Agriflux and GIS. Indeed, the use of GIS… More >

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Radhia Mansour, Abdessalem El Ghali
Revue Internationale de Géomatique, Vol.29, No.3, pp. 339-360, 2019, DOI:10.3166/rig.2019.00093
Abstract Flash floods are a type of natural disaster that poses a major threat to the population, urban constructions and road infrastructure and the environment. In Tunisia, this phenomenon is known since the sixties and has continued until today. The most important ones were recorded during the rainy years of 1969, 1983, 2003 and 2012. In order to identify areas at risk of flooding and reduce the vulnerability of the stakes, a Flash Flood Risk Mapping (FFRM) approach has been adopted for the development of a flood risk prevention plan (PPRI) in northeastern Tunisia. This method consists in: 1) integrating into… More >

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Nassira Zouaoui, Radhia Mansour, Abdessalem El Ghali
Revue Internationale de Géomatique, Vol.29, No.3, pp. 361-380, 2019, DOI:10.3166/rig.2020.00096
Abstract In the humid Mediterranean regions, particularly the NW of Tunisia, the Tessa catchment area is characterized by torrential and irregular rains, combined with significant deforestation, which causes severe erosion that carries away and redistributes the soil. The process of water erosion is very frequent and changes its dynamic aspect according to the evolution and spatial variation of the lithological nature of rocks, the geomorphology of landscapes, the geometry of watersheds and their bioclimatic situation. In this study, an appropriate methodological flowchart was followed by applying the PAP/RAC erosion mapping method, which is based on the principle of weighting the main… More >

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Bilel Salhi¹ , Mohsen Dhieb^2,3, Yamna Djellouli⁴
Revue Internationale de Géomatique, Vol.29, No.3, pp. 381-399, 2019, DOI:10.3166/rig.2020.00094
Abstract The city of Métlaoui is the most important urban core in Gafsa Mining Basin (BMG) in southwestern Tunisia. Like other BMG cities, it is characterized by a single industrial activity of phosphate enrichment and observes a spatial activity between the “European village” favorized to a certain term and the peripheral cities disadvantaged. Today, this dichotomy is not decreasing; on the contrary, the research reveals real signs of accentuation of this socio- spatial segregation inherited from colonial and post-colonial periods, and the environmental vicissitudes confirm the territorial iniquity. The research methodology has used for the social-spatial aspect heterogeneous data sources and… More >

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