Results 11 to 20 of about 117,366 (264)
La déforestation baisse en Amazonie. Vraiment ?
EchoGéo, 2023 The unexpected fall of deforestation in the Brazilian Amazon in 2022 has shown that deforestation phenomena are complex and that for many observers it is difficult to find their way in statistics and geospatial databases that are produced using different
François-Michel Le Tourneau
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On spatial database integration [PDF]
International Journal of Geographical Information Science, 1998 This paper investigates the problems that arise when application requirements dictate that autonomous spatial databases be integrated into a federated one. The paper focuses on the most critical issues raised by the integration of databases of different scales.
Devogele, Thomas +2 more
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Applied Sciences, 2022 The article considers the main sources of pollutionin the territory of the Republic of North Ossetia–Alania. A study of environmental geophysical factors in the city of Vladikavkaz was carried out at 126 points; indicators of noise pollution, electric ...
Vladislav Zaalishvili +3 more
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Assembling Cultural and Natural Values in Vernacular Landscapes: An Experimental Analysis
Remote Sensing, 2022 Cultural landscapes can host natural and cultural areas. However, often, this distinction is not clear cut and the attempts to clarify this blur the character of landscapes.
Pablo Altaba +2 more
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Linear separability in spatial databases [PDF]
Knowledge and Information Systems, 2017 Given two point sets $R$ and $B$ in the plane, with cardinalities $m$ and $n$, respectively, and each set stored in a separate R-tree, we present an algorithm to decide whether $R$ and $B$ are linearly separable. Our algorithm exploits the structure of the R-trees, loading into the main memory only relevant data, and runs in $O(m\log m + n\log n)$ time
Claudio Torres +2 more
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SPATIAL DATABASES OF AGRONOMIC GEOINFORMATION SYSTEMS
Siberian Journal of Life Sciences and Agriculture, 2022 The work is devoted to the development of spatial databases for the assessment of agricultural land. The geodatabase is aimed at geoinformation support of assessment, agroecological typing (groups, types of land) of agricultural lands, development of ...
Anna I. Pavlova
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Approximate MaxRS in spatial databases [PDF]
Proceedings of the VLDB Endowment, 2013 In the maximizing range sum (MaxRS) problem, given (i) a setPof 2D points each of which is associated with a positive weight, and (ii) a rectanglerof specific extents, we need to decide where to placerin order to maximize the covered weight ofr- that is, the total weight of the data points covered byr.
Yufei Tao 0001 +3 more
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Global Center Point Splitting: New Linear Node Splitting Algorithm for R-Trees [PDF]
مجلة جامعة النجاح للأبحاث العلوم الطبيعية, 2016 We introduce a new linear algorithm to split overflowed nodes of an R-tree index called the Global Center Point Splitting (GCPS) algorithm. The proposed method is an enhancement of the Quadratic splitting algorithm proposed by Guttmann (Guttman A, 1984 ...
Manar Arafat
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Spatial searching in geometric databases [PDF]
Proceedings. Fourth International Conference on Data Engineering, 2003 A principle is presented for transforming suitable index structures for points into index structures for k-dimensional intervals. In many applications, these intervals serve as simple geometric keys for nonzero-size objects. The transformation fully preserves the advantages of the selected index structure for points, such as efficient update and ...
Six, Hans-Werner, Widmayer, Peter
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Spatial Multi-Criteria Analysis of Water-Covered Areas: District City of Katowice—Case Study
Remote Sensing, 2023 The following databases contains information on land use with water in Poland: Corine Land Cover (CLC), the Urban Atlas (UA); Database of Topographic Objects (BDOT) the digital Map of Poland’s Hydrographic Division (MPHP); and the Register of Lands and ...
Natalia Janczewska +3 more
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