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Spatiotemporal Dynamics of the Relative Abundance of Soil Nutrient-Degrading Enzyme-Encoding Genes Across Continental US Ecoregions. [PDF]

Ecol Evol
Jung CG, Gautam S, Song Y, Poorey K, Mishra U.   +4 more
europepmc   +1 more source

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Decomposing spatial databases and applications

Proceedings 11th International Workshop on Database and Expert Systems Applications, 2002
Topological invariants of spatial databases can act as a basic structure to tackle relevant problems in the field. It turns out that the main concern in these problems is the manipulation of topological invariants by means of efficient algorithms. To this aim, we introduce the notion of boundary decomposition of a topological invariant and give a ...
CICERONE, SERAFINO, FRIGIONI, DANIELE, Di Felice P.   +2 more
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Semantics in spatial databases

1998
In this paper we discuss two data models for spatial database systems: the linear data model and the topological data model. Both can be used to model a wide range of applications. The linear data model is particularly suited to model spatial database applications in which exact geometrical information is required and in which this information can be ...
Bart Kuijpers, Jan Paredaens, Luc Vandeurzen   +2 more
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Clustering in Dynamic Spatial Databases

Journal of Intelligent Information Systems, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ji Zhang, Wynne Hsu, Mong-Li Lee
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Genericity in Spatial Databases

2000
In 1980, Chandra and Harel investigated, in the context of the relational database model, which queries are “reasonable”. They characterized this class of queries by means of the concept of genericity, which has since taken a central position in the theory of computable queries.
Kuijpers, B., van Gucht, D.
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Research of spatial database based on spatial database engine

SPIE Proceedings, 2007
With increasing demands of GIS applications system in a complex, integrated, and other areas, the spatial data are required rapid growth for the systems, and users are more and more on the demand spatial data. The method which traditional documents express spatial data is obviously unable to meet these needs.
Mengquan Wu, Wuihong Cui, Xiaodong Yang, Yongqi Huang   +3 more
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Ranking in spatial databases

1995
An algorithm for ranking spatial objects according to increasing distance from a query object is introduced and analyzed. The algorithm makes use of a hierarchical spatial data structure. The intended application area is a database environment, where the spatial data structure serves as an index.
Gísli R. Hjaltason, Hanan Samet
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dedale, a spatial constraint database

1998
This paper presents a first prototype of a constraint database for spatial information, dedale. Implemented on top of the O2 DBMS, data is stored in an object-oriented framework, with spatial data represented using linear constraints over a dense domain. The query language is the standard OQL, with special functions for constraint solving and geometric
Grumbach, Stéphane, Rigaux, Philippe, Scholl, Michel, Segoufin, Luc   +3 more
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Spatial Databases

2005
Section I: Modeling and Systems, Chapter I. Survey on Spatial Data Modeling Approaches, Chapter II. Integrating Web Data and Geographic Knowledge into Spatial Databases, Section II: Indexing Techniques, Chapter III. Object-Relational Spatial Indexing, Chapter IV. Quadtree-Based Image Representation and Retrieval, Chapter V.
Shashi Shekhar, Pusheng Zhang, Sanjay Chawla   +2 more
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Spatial Databases

2017
Spatial databases maintain space information which is appropriate for applications where there is need to monitor the position of an object or event over space. Spatial databases describe the fundamental representation of the object of a dataset that comes from spatial or geographic entities.
Grace L. Samson, Joan Lu, Mistura M. Usman, Qiang Xu   +3 more
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