756 search results - page 147 / 152 » Using topology for spatial reasoning |
GIS
2008
ACM
14 years 8 months ago
2008
ACM
Information and specifically Web pages may be organized, indexed, searched, and navigated using various metadata aspects, such as keywords, categories (themes), and also space. Wh...
GIS
2003
ACM
14 years 8 months ago
2003
ACM
With the proliferation of mobile computing, the ability to index efficiently the movements of mobile objects becomes important. Objects are typically seen as moving in two-dimensi...
GIS
2004
ACM
14 years 8 months ago
2004
ACM
Triangular Irregular Network (TIN) and Regular Square Grid (RSG) are widely used for representing 2.5 dimensional spatial data. However, these models are not defined from the topo...
GIS
2005
ACM
14 years 8 months ago
2005
ACM
Numerous raster maps are available on the Internet, but the geographic coordinates of the maps are often unknown. In order to determine the precise location of a raster map, we ex...
SIGMOD
2008
ACM
14 years 7 months ago
2008
ACM
Mobile devices equipped with positioning capabilities (e.g., GPS) can ask location-dependent queries to Location Based Services (LBS). To protect privacy, the user location must n...