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Anh Tu Hoang¹ , Philippe Apparicio¹, Thi-Thanh-Hien Pham²
Revue Internationale de Géomatique, Vol.29, No.2, pp. 135-158, 2019, DOI:10.3166/rig.2019.00071
Abstract The objective of this article is to assess environmental equity regarding the accessibility of parks for four population groups (children, older people, low-education individuals, and highly-educated persons) in Ho Chi Minh City (HCMC). To achieve this, two accessibility measures calculated according to network distance in GIS: the distance to the nearest park (immediate proximity) and the enhanced two-step floating catchment area method (availability based on supply and demand). Several regression models were then constructed, with the accessibility measures as dependent variables and the percentages of the four groups as independent variables. The results show that the accessibility of parks in… More >

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Hussein El Hage Hassan¹ , Ghaleb Faour², Laurence Charbel³, Laurent Touchart⁴
Revue Internationale de Géomatique, Vol.29, No.2, pp. 159-184, 2019, DOI:10.3166/rig.2019.00072
Abstract Water erosion is a degradation form that results in the stripping of mineral and organic elements from the soil. Due to the impact of meteoric factors (rain, wind) this global phenomenon, soil erosion, affects the productivity of agricultural land. Water erosion is a global phenomenon that affects the productivity of agricultural land. The absence of a protective cover and intense precipitation made the Litani River Basin a vulnerable region to water erosion. Besides, the absence of climate data has brought about erosion hazard mapping using a qualitative method which combines factors such as tillage erosion, infiltration into the rocks, land… More >

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Anne Ruas, Ha Pham, Laura Pinson
Revue Internationale de Géomatique, Vol.29, No.2, pp. 185-205, 2019, DOI:10.3166/rig.2019.00081
Abstract Many studies and research aim at better knowing phenomena such as pollution or climate. The fields of value representing these phenomena can be visualized on scientific visualization tools which do not have the richness of symbolization specific to the GIS, in particular for the georeferencing and for the representation of the vector objects describing the geographical context. The representation in raster on GIS is possible but limited. However, at the scientific level, it is important to be able to co-visualize the fields describing phenomena in their geographical context to better analyze them and make assumptions about the interactions between a… More >

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Khaled Belhassine^1,3, Jacques Renaud^1,2,3, Leandro Coelho^1,2,3,4, Jean-Philippe Gagliardi⁵
Revue Internationale de Géomatique, Vol.29, No.2, pp. 207-230, 2019, DOI:10.3166/rig.2019.00090
Abstract In this article, we present a spatio-temporal analysis of delivery routes from GPS points of private vehicles. Several thousand GPS geolocation observations obtained from this delivery routes are collected, processed and map matched to the road network. As a result of these spatio-temporal analyzes, we develop daily congestion index calendars as a function of the time of the day. The sectorial congestion ratios are computed and used to determine the best delivery departure times, in order to avoid road congestion. Using data from our industrial partner, our analyzes indicate a potential reduction of 22% of the duration of the delivery… More >

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