1422 search results - page 91 / 285 » Hierarchical Spatial Data Structures |
GIS
1995
ACM
14 years 24 days 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 ...
SAINT
2007
IEEE
14 years 3 months ago
2007
IEEE
To achieve a smart sensor network with Web-based sensor nodes such as Field Servers, we propose a hierarchical agent system that manages sensor nodes autonomously and flexibly, an...
WEBI
2007
Springer
14 years 3 months ago
2007
Springer
— We propose a hierarchical approach to document categorization that requires no pre-configuration and maps the semantic document space to a predefined taxonomy. The utilizatio...
ICPR
2008
IEEE
14 years 10 months ago
2008
IEEE
In this work we present a model that uses a Dirichlet Process (DP) with a dynamic spatial constraints to approximate a non-homogeneous hidden Markov model (NHMM). The coefficient ...
ICDIM
2009
IEEE
14 years 3 months ago
2009
IEEE
We propose the mqr-tree, a two-dimensional spatial access method that improves upon the 2DR-tree. The 2DRtree uses two-dimensional nodes so that the relationships between all obje...