Journal ArticleDOI
Efficient retrieval of the top-k most relevant spatial web objects
Gao Cong,Christian S. Jensen,Dingming Wu +2 more
- Vol. 2, Iss: 1, pp 337-348
TLDR
A new indexing framework for location-aware top-k text retrieval that encompasses algorithms that utilize the proposed indexes for computing the top- k query, thus taking into account both text relevancy and location proximity to prune the search space.Abstract:
The conventional Internet is acquiring a geo-spatial dimension. Web documents are being geo-tagged, and geo-referenced objects such as points of interest are being associated with descriptive text documents. The resulting fusion of geo-location and documents enables a new kind of top-k query that takes into account both location proximity and text relevancy. To our knowledge, only naive techniques exist that are capable of computing a general web information retrieval query while also taking location into account.This paper proposes a new indexing framework for location-aware top-k text retrieval. The framework leverages the inverted file for text retrieval and the R-tree for spatial proximity querying. Several indexing approaches are explored within the framework. The framework encompasses algorithms that utilize the proposed indexes for computing the top-k query, thus taking into account both text relevancy and location proximity to prune the search space. Results of empirical studies with an implementation of the framework demonstrate that the paper's proposal offers scalability and is capable of excellent performance.read more
Citations
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Book ChapterDOI
Collective POI Querying Based on Multiple Keywords and User Preference
TL;DR: A novel approach which aims to retrieve collective POIs based on multiple keywords given by a user as well as user preference, POI popularity and congestion is devised and an efficient algorithm based on IR-tree is proposed which finds the optimal solution to achieve the balance between multiple optimization targets.
Journal ArticleDOI
Wavelet Tree based Hybrid Geo-Textual Indexing Technique for Geographical Search
Arun Kumar Yadav,Divakar Yadav +1 more
TL;DR: This paper uses a new spatial-textual hybrid indexing technique, based on Wavelet Tree (WT) to handle point and region queries for Geographical Information Retrieval and outperforms the existing algorithms both in terms of simplicity in implementation and searching time.
Journal ArticleDOI
MobiFeed: A location-aware news feed framework for moving users
TL;DR: Experimental results show that MobiFeed obtains a relevance score two times higher than the state-of-the-art approach, and it can scale up to a large number of geo-tagged messages.
Book ChapterDOI
Location-Aware Tag Recommendations for Flickr
Ioanna Miliou,Akrivi Vlachou +1 more
TL;DR: This paper proposes novel location-aware tag recommendation methods for geotagging and demonstrates the effectiveness of the proposed methods.
Posted Content
Efficient Region of Visual Interests Search for Geo-multimedia Data
TL;DR: To improve the performance of query, a novel spatial indexing structure called quadtree based inverted visual index which is a combination of quadtree, inverted index and visual words is proposed and based on it, a efficient search algorithm named region of visual interests search is designed to support RoVIQ.
References
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Book
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TL;DR: The second edition of a quarterly column as discussed by the authors provides a continuing update to the list of problems (NP-complete and harder) presented by M. R. Garey and myself in our book "Computers and Intractability: A Guide to the Theory of NP-Completeness,” W. H. Freeman & Co., San Francisco, 1979.
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Proceedings ArticleDOI
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Proceedings ArticleDOI
The R*-tree: an efficient and robust access method for points and rectangles
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