16 search results - page 3 / 4 » Supporting Complex Thematic, Spatial and Temporal Queries ov... |
ESWS
2009
Springer
14 years 2 months ago
2009
Springer
: Earth Observations (EO) collect various characteristics of the objective environment using sensors which often have different measuring, spatial and temporal coverage. Making ind...
SAC
2008
ACM
13 years 7 months ago
2008
ACM
We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language t...
ER
2008
Springer
13 years 9 months ago
2008
Springer
Modern information systems, and web information systems in particular, are faced with frequent database schema changes, which generate the necessity to manage them and preserve the...
AAAI
2007
13 years 10 months ago
2007
Efficient query answering over ontologies is one of the most useful and important services to support Semantic Web applications. Approximation has been identified as a potential...
EDBTW
2004
Springer
14 years 28 days ago
2004
Springer
Many users and applications require the integration of semi-structured data from autonomous, heterogeneous Web sources. Over the last years mediator systems have emerged that use d...