An overview is presented of the issues in building spatial databases. The focus is on data models and query processing. Query optimization in a spatial environment is also brie y discussed.

water resource constraints on the one side, the industrial and urban infrastructures which cannot cope with the growing demand, and the need for adequate planning on the other hand, emphasizes the importance of using a comprehensive and systematic approach in the field of water resources management and infrastructure development more obvious and significant day by day. also, exposure to large a...

Based on our systematic studies of IRLS (InfraRed Line-Scanner) image statistical properties and comparative analyzes of state-of-the-art transform based image coders, we propose coding performance improvements by spatial image segmentation and operational rate-distortion optimization. We present in this paper, a new approach for an adaptive coding of IRLS images which combines the advantages o...

We propose a new multi-way spatial join algorithm called M-way R-tree join which synchronously traverses M R-trees. The Mway R-tree join can be considered as a generalization of the 2-way R-tree join. Although a generalization of the 2-way R-tree join has recently been studied, it did not properly take into account the optimization techniques of the original algorithm. Here, we extend these opt...

During the last two decades, evolutionary algorithms (EAs) have been applied to a wide range of optimization and decision-making problems. Work on EAs for geographic analysis, however, has been conducted in a problem-specific manner, which prevents an EA designed for one type of problem to be used on others. The purpose of this paper is to describe a framework that unifies the design and implem...

Although being increasingly powerful in handling spatial data, geographical information systems (GIS) still lack the powerful functionality for process modeling in terms of simulation and optimization. This article discusses the concepts and methodologies of a geographical simulation and optimization system (GeoSOS). GeoSOS integrates cellular automata (CA), agent-based models (ABMs), and swarm...

A central problem in modern database design is how to resolve spatial operations with normal database operations in an extended relational database environment. A data architecture that matches the requirements for efficient processing of spatial queries in the extended database environment is proposed. It provides an equal opportunity for both the spatial components and the non-spatial compone...

In practical decision making, one often is interested in solutions that balance multiple objectives. In this study we focus on generating efficient solutions for optimization problems with two objectives and a large but finite number of feasible solutions. Two classical approaches exist, being the constraint method and the weighting method, for which a specific implementation is required for th...