Spatio-temporal databases aim to support extensions to existing models of Spatial Information Systems (SIS) to include time in order to better describe our dynamic environment. Although interest into this area has increased in the past decade, a number of important issues remain to be investigated. With the advances made in temporal database research, we can expect a more uni®ed approach toward...

We present a new approach to implement an object bitempo-ral database where both valid-time and transaction-time are represented. It is based on the DataBase Version model, which allows an eecient management of object versions. This facilitates the manipulation of past events and allows a straightforward representation of branching evolution in valid-time.

Understanding and studying urban evolutions is important regarding their potential consequences. In order to apprehend such phenomena, agent based urban simulations can be used. In this context, the increasing availability of 3D urban data can be put to use for simulations so as to gain a finer understanding of urban evolutions. We propose a novel approach integrating 3D data and their analysis...

Newer spatial technologies, such as spatio-temporal databases, geo-sensor networks, and other remote sensing methods, require mechanisms to efficiently process spatial data and identify (and in some cases fix) data items that do not conform to rigorously defined spatial data type definitions. In this paper, we propose an O(n lg n) time complexity algorithm that examines a spatial configuration,...

Large temporal Databases (TDBs) usually contain a wealth of data about temporal events. Aimed at discovering temporal patterns with during relationship (during-temporal patterns, DTPs), which is deemed common and potentially valuable in real-world applications, this paper presents an approach to finding such DTPs by investigating some of their properties and incorporating them as desirable prun...

The ramification problem is a hard and ever present problem in systems exhibiting a dynamic behavior. The area of temporal databases in particular is still lacking satisfactory solutions to the ramification problem. In this paper, we address the ramification problem based on causal relationships that take time into account. We study the problem for both instantaneous actions and actions with du...

This paper proposes the Temporal Versioned Constraint Language (TVCL), which provides a declarative and non ambiguous way to user specification of constraints for temporal databases with versions support, based on the Temporal Versions Model (TVM). This language gives support to time and versions characteristics of data and of the constraints themselves, allowing the definition of constraints v...

The growth of cities represents huge problems for modern societies. The explanation of the phenomena involves the description of changes. The Danish Building & Dwelling database is a quasi spatio-temporal database containing spatial dimensions as well as a temporal one. Based on this database, a time-series animation of the urban growth in the Copenhagen Metropolitan area is produced. Furthermo...

Conventional database systems are capable of storing only the current perception of reality and the current relationship among objects. Such databases enforce currency of data by excluding old data values when newer ones become available. After such currency updates, the old values are lost from the logical level and only the current state remains available. On the other hand, temporal database...

Most existing natural language database interfaces (nldbs) were designed to be used with database systems that provide very limited facilities for manipulating time-dependent data, and they do not support adequately temporal linguistic mechanisms (verb tenses, temporal adverbials, temporal subordinate clauses, etc.). The database community is becoming increasingly interested in temporal databas...