A DAG Comparison Algorithm and Its Application to Temporal Data Warehousing
We present a new technique for discovering and representing structural changes between two versions of a directed acyclic graph...
Time-Aggregated Graphs for Modeling Spatio-temporal Networks
Given applications such as location based services and the spatio-temporal queries they may pose on a spatial network (eg....
Handling Changes of Database Schemas and Corresponding Ontologies
Currently, knowledge from biological research is stored in hundreds of databases, counting only public accessible ones. Finding specific data...
An ISO TC 211 Conformant Approach to Model Spatial Integrity Constraints in the Conceptual...
The ISO TC 211 standards have defined a set of formal models for the conceptual modeling of spatial data...
Access Control in Geographic Databases
The problem of access control in databases consists of determining when (and if) users or applications can access stored...
VTPR-Tree: An Efficient Indexing Method for Moving Objects with Frequent Updates
Moving object databases are required to support queries on a large number of continuous moving objects. Indexes for moving...
New Query Processing Algorithms for Range and k-NN Search in Spatial Network Databases
In this paper, we design the architecture of disk-based data structures for spatial network databases (SNDB). Based on this...
A ONCE-Updating Approach on Moving Objects
Indexing methods that manage current states of moving objects in a database are confronted with keeping their indexes up...
A Progressive Transmission Scheme for Vector Maps in Low-Bandwidth Environments Based on Device Rendering
The Internet has created an interesting environment for geospatial data sharing, so that users may transfer, visualize, manipulate and...
Map2Share – A System Exploiting Metadata to Share Geographical Information
A crucial aspect in GIS project development is the high cost that companies face to collect geographical data. On...
