641 search results - page 104 / 129 » Ontology-Driven Geographic Information Systems |
GIS
2007
ACM
14 years 8 months ago
2007
ACM
Many Geographic Information System (GIS) applications must handle large geospatial datasets stored in raster representation. Spatial joins over raster data are important queries i...
MOBIHOC
2009
ACM
14 years 8 months ago
2009
ACM
Finding data items is one of the most basic services of any distributed system. It is particular challenging in ad-hoc networks, due to their inherent decentralized nature and lac...
CHI
2002
ACM
14 years 8 months ago
2002
ACM
We report on our experiences of introducing an instant messaging and group chat application into geographically distributed workgroups. We describe a number of issues we encounter...
MOBIHOC
2003
ACM
14 years 7 months ago
2003
ACM
It is often useful to know the geographic positions of nodes in a communications network, but adding GPS receivers or other sophisticated sensors to every node can be expensive. W...
MM
2009
ACM
14 years 2 months ago
2009
ACM
We present a novel data-driven algorithm that leverages online image repositories such as Flickr for automatically generating tourist maps. Our hypothesis is that, given a large e...