321 search results - page 14 / 65 » A Topological Data Model for Spatial Databases |
GIS
2004
ACM
14 years 8 months ago
2004
ACM
Motivated by the increasing need to handle complex multidimensional data in location-based data warehouses, this paper proposes a powerful data model that is able to capture the c...
PODS
1993
ACM
13 years 11 months ago
1993
ACM
In this paper, we motivate four di erent user de ned window query classes and derive a probabilistic model for each of them. For each model, we characterize the e ciency of spatia...
DMDW
2003
13 years 9 months ago
2003
Geographic Information Systems (GIS) showed their insufficiencies in front of complex requests for decision-makers. Resulting of the association of the databases and the decision-m...
SAC
2011
ACM
12 years 10 months ago
2011
ACM
A moving region whose location and extend change over time can imply topological changes such as region split and hole formation. To study this phenomenon is useful in many applic...
NAR
2006
13 years 7 months ago
2006
EMAGE (http://genex.hgu.mrc.ac.uk/Emage/database) is a freely available, curated database of gene expression patterns generated by in situ techniques in the developing mouse embry...