This paper presents a rst 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 operations. A simple geographical applicatio...

Nowadays, more and more spatial databases are used in various fields, so the demands for keeping spatial database “fresh” are growing rapidly. Generally, the end-users get the basic spatial data from professional spatial data producers. There are mainly two kinds of way for transfer the changed data. One is to batch transfer; the other is incremental data transfer. With the batch method, the wh...

The paper firstly introduces grid technology and spatial database. Secondly it has designed the spatial database model in grid environment, which contains Application layer, Collective Layer and Fabric Layer; and then it has researched the working flow. At last, the simulation experiment of the spatial database model in grid environment has been carried out compared with traditional spatial dat...

We propose a definition of a spatial database system as a database system that offers spatial data types in its data model and query language and supports spatial data types in its implementation, providing at least spatial indexing and spatial join methods. Spatial database systems offer the underlying database technology for geographic information systems and other applications. We survey dat...

Several representations have been created to store topological information in normal spatial databases. However, not that much work has been done to store such relationships for spatiotemporal data. This paper extends the representation of moving objects from [7] so that it can also store and enforce some of the topological relationships between the objects. This is done in a fashion similar to...