The management of geometric objects is a prime example of an application where efficiency is the bottleneck; this bottleneck cannot be eliminated without using suitable access structures. The most popular approach for handling complex spatial objects in spatial access methods is to use their minimum bounding boxes as a geometric key. Obviously , the rough approximation by bounding boxes provide...

We consider spatial databases and queries definable using first-order logic and real polynomial inequalities. We are interested in topological queries: queries whose result only depends on the topological aspects of the spatial data. Two spatial databases are called topologically elementary equivalent if they cannot be distinguished by such topological first-order queries. Our contribution is a...

Although some database query languages provide basic functions useful for statistical data analysis and others contain spatial query capabilities, there is as yet no database language implementation which satisfies even basic requirements of spatial analysis GeoSAL is a database language being designed to address the solution of descriptive data analysis tasks in general, and spatial analysis p...

To develop low-carbon economy it is vital to introduce technology and technical innovation in effective ways to deal with climate change and control greenhouse gases emission. This would benefit greatly the participation in international cooperation and achieve socio-economic development goals in China. In the present work, the author performed a study on visualization and GIS-based spatial ana...

In this paper a spatial database for telecommunications geographic information system and its applications are presented. This spatial database has been created using methodology established at the Computer Graphic and GIS Lab at the Faculty of Electronic Engineering in Nis. This database is essential part of telecommunications GIS GeoTT which is intended to input, store, retrieve and show data...

A spatial dataset is consistent if it satisfies a set of integrity constraints. Although consistency is a desirable property of databases, enforcing the satisfaction of integrity constraints might not be always feasible. In such cases the presence of inconsistent data may have a negative effect on the results of data analysis and processing and, in consequence, there is an important need for da...

The importance of topological relationships between spatial objects is recognized in many disciplines. In the field of spatial databases, topological relationships have played an important role, providing mechanisms for spatial constraint specification and spatial indexing techniques. The use of spatial data in a map form has become popular, resulting in spatial data models such as topologies o...

Geo-referenced information is characterised by the fact that it may be represented on maps at different levels of detail or generalisation. Ideally a spatial database will provide access to spatial data across a continuous range of resolution and multiple levels of generalisation. Existing work on multiresolution databases has treated generalisation control as one-dimensional. Here we extend th...

Location-aware application s need not only rapid location-related query, but also proactive spatial event service, both of which the traditional database system does not excel at. Aiming at the deficiencies of database system, we present a light-weighted proactive spatial service model for Smart Classroom: ASMod. This model adopts such new technologies as combined spatial index, refreshing-up &...