813 search results - page 72 / 163 » The Spatial Semantic Hierarchy |
AMAST
2004
Springer
14 years 22 days ago
2004
Springer
We study the semantics and refinement of mobile objects, considering an extension of core UML state machines by primitives that designate the location of objects and their moves wi...
PODS
2006
ACM
14 years 9 months ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
GIS
2005
ACM
14 years 10 months ago
2005
ACM
Topological predicates, as derived from the 9-intersection model, have been widely recognized in GIS, spatial database systems, and many other geo-related disciplines. They are ba...
RR
2007
Springer
14 years 3 months ago
2007
Springer
Geo-ontologies have a key role to play in the development of the geospatial-semantic web, with regard to facilitating the search for geographical information and resources. They no...
GEOINFO
2004
13 years 10 months ago
2004
Abstract With the proliferation of Geographic Information Systems (GIS) and spatial resources over the Internet, there is an increasing demand for robust geospatial information ser...