980 search results - page 78 / 196 » GIS |
256
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GIS
2008
ACM
16 years 6 months ago
2008
ACM
In this paper, we follow the role-based access control (RBAC) approach and extend it to provide for the dynamic association of roles with users. In our framework, privileges assoc...
261
Voted
GIS
2004
ACM
16 years 6 months ago
2004
ACM
Moving point object data can be analyzed through the discovery of patterns. We consider the computational efficiency of detecting four such spatio-temporal patterns, namely flock,...
294
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GIS
2004
ACM
16 years 6 months ago
2004
ACM
This paper presents a fast algorithm for smooth digital elevation model interpolation and approximation from scattered elevation data. The global surface is reconstructed by subdi...
232
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GIS
2006
ACM
16 years 6 months ago
2006
ACM
We give two efficient on-line algorithms to simplify weighted graphs by eliminating degree-two vertices. Our algorithms are on-line -- they react to updates on the data, keeping t...
260
Voted
GIS
2006
ACM
16 years 6 months ago
2006
ACM
Moving point object data can be analyzed through the discovery of patterns. We consider the computational efficiency of computing two of the most basic spatio-temporal patterns in...