Titlebook: Advances in Spatial Databases; 2nd Symposium, SSD ‘ Oliver Günther,Hans-J?rg Schek Conference proceedings 1991 Springer-Verlag Berlin Heide

deficiency

Reasoning about binary topological relations,rmalism is based upon the nine intersections of boundaries, interiors, and complements between two objects. Properties of topological relations are determined by analyzing the nine intersections to detect, for instance, symmetric topological relations and pairs of converse topological relations. Bas

Living-Will

Topological constraints: A representational framework for approximate spatial and temporal reasoninmilarities between spatial and temporal reasoning which can be exploited to build an integrated reasoning framework. The latter is important because planning and reasoning usually requires consideration of both the temporal and spatial aspects of the situation under study. Topological constraints ar

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Instrumental

豎琴

Properties of geographic data: Requirements for spatial access methods,m (GIS) and are currently a prominent topic for research in spatial databases. Their performance is influenced by the properties of spatial data. This paper details the specific properties of spatial data in a Geographic Information system. It concentrates on Geographic Information Systems that stor

Estrogen

peak-flow

The performance of object decomposition techniques for spatial query processing,nt new requirements on spatial database systems, in particular on efficient query processing of complex spatial objects. In this paper, we propose a two-level, multi-representation query processing technique which consists of a filter and a refinement level. The efficiency of spatial query processin

CLAP

Performance comparison of segment access methods implemented on top of the buddy-tree,ailed discussion and a comprehensive experimental performance comparison of these methods. Each of the segment access methods is implemented on top of an ordinary point access method using the techniques clipping, overlapping regions and transformation. As the basic point access method we have chose

considerable

vitreous-humor

The use of a complex object language in geographic data management,s. This paper describes a language called XSQL/2 which extends the facilities of SQL to provide better support for these applications in general, and geographic applications in particular.. Among the extensions, we find: the introduction of unique identifiers for tuples, the introduction of base (hi