Sciweavers

GIS
2010
ACM
13 years 10 months ago
Investigation of aggregation effects in vegetation condition monitoring at a national scale
Monitoring vegetation condition is an important issue in the Mediterranean region, in terms of both securing food and preventing fires. Vegetation indices (VIs), mathematical tran...
T. K. Alexandridis, T. Katagis, I. Z. Gitas, N. G....
GIS
2010
ACM
13 years 10 months ago
Location disambiguation in local searches using gradient boosted decision trees
Local search is a specialization of the web search that allows users to submit geographically constrained queries. However, one of the challenges for local search engines is to un...
Ritesh Agrawal, James G. Shanahan
GIS
2010
ACM
13 years 10 months ago
Decentralized querying of topological relations between regions without using localization
This paper proposes an efficient, decentralized algorithm for determining the topological relationship between two regions monitored by a geosensor network. Many centralized algo...
Matt Duckham, Myeong Hun Jeong, Sanjiang Li, Joche...
GIS
2010
ACM
13 years 10 months ago
Quantitative analysis of simulated erosion for different soils
Rensselaer Polytechnic Institute Troy, NY Levee overtopping can lead to failure and cause catastrophic damage, as was the case during Hurricane Katrina. We present a computer simu...
Zhongxian Chen, Christopher Stuetzle, Barbara Cutl...
GIS
2010
ACM
13 years 10 months ago
Selecting tracking principals with epoch awareness
Oliviu Ghica, Goce Trajcevski, Fan Zhou, Roberto T...
GIS
2010
ACM
13 years 10 months ago
A case for time-dependent shortest path computation in spatial networks
The problem of point-to-point shortest path computation in spatial networks is extensively studied with many approaches proposed to speed-up the computation. Most of the existing ...
Ugur Demiryurek, Farnoush Banaei Kashani, Cyrus Sh...
GIS
2010
ACM
13 years 10 months ago
Extracting moving regions from spatial data
We provide an algorithm that can construct a valid moving region from snapshots of a region in time. Our algorithm is robust in the sense that given valid input regions, the gener...
Mark McKenney, James Webb
GIS
2010
ACM
13 years 10 months ago
Detecting nearly duplicated records in location datasets
The quality of a local search engine, such as Google and Bing Maps, heavily relies on its geographic datasets. Typically, these datasets are obtained from multiple sources, e.g., ...
Yu Zheng, Xixuan Fen, Xing Xie, Shuang Peng, James...
GIS
2010
ACM
13 years 10 months ago
Exploiting local node cache in top-k queries within wireless sensor networks
Top-k queries are a popular type of query in Wireless Sensor Networks. Typical solutions rely on coordinated root-tonodes and nodes-to-root messages and on maintaining filters at...
Johannes Niedermayer, Mario A. Nascimento, Matthia...
GIS
2010
ACM
13 years 10 months ago
Bridge detection in grid terrains and improved drainage enforcement
Bare Earth gridded digital elevation models (DEMs) are often used to extract hydrologic features such as rivers and watersheds. DEMs must be conditioned by removing spurious sinks...
Ryan Carlson, Andrew Danner