671 search results - page 38 / 135 » Spatial Reasoning with a Hole |
GIS
2010
ACM
13 years 5 months ago
2010
ACM
Spatial Alarms are reminders for mobile users upon their arrival of certain spatial location of interest. Spatial alarm processing requires meeting two demanding objectives: high ...
GIS
1995
ACM
13 years 11 months ago
1995
ACM
An algorithm is presented to answer window queries in a quadtree-based spatial database environment by retrieving the covering blocks in the underlying spatial database. It works ...
GIS
2010
ACM
13 years 6 months ago
2010
ACM
It is cost-effective for data owners to publicize their spatial databases via database outsourcing; however, data privacy and query integrity are major challenges. In this demonst...
GIS
2008
ACM
13 years 7 months ago
2008
ACM
Spatially enabled government requires the development of effective SDIs that will support the vast majority of society, who are not spatially aware, in a transparent manner. This ...
TIME
2009
IEEE
14 years 2 months ago
2009
IEEE
—Rule-based filters are sequences of rules formed of a condition and a decision. Rules are applied sequentially up to the first fulfilled condition, whose matching decision de...