Results 21 to 30 of about 5,483,277 (408)
Representation and Reasoning for Model of 3DR46 in Complex 3D Space
Jisuanji kexue yu tansuo, 2020 To remedy the deficiency of the existing methods on 3D direction relations, the 3DR46 direction relations model is proposed. The model can represent and distinguish 246 complex 3D direction relations. To process the dynamic of 3D direction relations, the
HAO Xiaohong, LI Song, HAO Zhongxiao
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A spatial database for reroute planning [PDF]
2012 IEEE/AIAA 31st Digital Avionics Systems Conference (DASC), 2012 Current storage and retrieval of air traffic management data by the FAA allows for sufficient control of aircraft flows in the National Airspace System. However, these storage methods allow neither for deep historical analysis nor for use of advanced, standards-compliant tools. Another shortcoming of these storage methods is that air traffic management
Rios, J., Jehlen, R., Zhifan Zhu,
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Computing the inverse of cardinal direction relations between regions
Journal of Intelligent Systems, 2022 The inversion of directions is an important operation with directions which plays an important role in qualitative spatial reasoning and spatial queries. In this work, we address on the inversion operation of the basic cardinal direction relations in the
Wang Miao +5 more
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Fuzzy Reliability in Spatial Databases [PDF]
Advances in Fuzzy Systems, 2013 Today it is very difficult to evaluate the quality of spatial databases, mainly for the heterogeneity of input data. We define a fuzzy process for evaluating the reliability of a spatial database: the area of study is partitioned in isoreliable zones, defined as homogeneous zones in terms of data quality and environmental characteristics.
F. Di Martino, SESSA, SALVATORE
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ISPRS International Journal of Geo-Information, 2023 Historical geographic data play an important supporting role in the study of long-term geographic studies, such as climate change, urban expansion and land-use and land-cover change.
Shuang Li
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MaaSDB: Spatial Databases in the Era of Large Language Models (Vision Paper) [PDF]
, 2023 Large language models (LLMs) are advancing rapidly. Such models have demonstrated strong capabilities in learning from large-scale (unstructured) text data and answering user queries. Users do not need to be experts in structured query languages to interact with systems built upon such models.
arxiv +1 more source
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
Pablo Pérez-Lantero +2 more
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The combination of spatial access methods and computational geometry in geographic database systems [PDF]
, 1991 Geographic database systems, known as geographic information systems (GISs) particularly among non-computer scientists, are one of the most important applications of the very active research area named spatial database systems. Consequently following the
Brinkhoff, Thomas +2 more
core +2 more sources
ISPRS International Journal of Geo-Information, 2022 The article attempts to redefine the names for the research area, which is the use of information systems for the analysis and management of spatial data.
Artur Krawczyk
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W42 - a scalable spatial database system for holding Digital Elevation Models [PDF]
, 2009 The design of a scalable system for holding spatial data in general and digital elevation models (DEMs) in specific has to account for the characteristics of data from various application fields.
Habermeyer, Martin +2 more
core +1 more source