Continuous Obstructed Nearest Neighbor Queries in Spatial Databases

Summary: CONN: continuous obstructed nearest neighbor search on a query segment q; returns nearest data point under obstructed distance. Proposes exact CONN/COkNN with R-tree indices, a control-point and quad-split scheme; evaluated on real and synthetic data. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID: 4210
Venue: SIGMOD
Year: 2009
Pagerank: 5.6928705e-05
Overall Rank: 7,140 | 51.02%
DOI: 10.1145/1559845.1559906

Incoming Non-self Citations Over Time

Authors

1. Yunjun Gao (Singapore Management University)
2. Baihua Zheng (Singapore Management University)

BibTeX Citation

@inproceedings{gao_sigmod09,
        title = {{Continuous Obstructed Nearest Neighbor Queries in Spatial Databases}},
        author = {Gao, Yunjun and Zheng, Baihua},
        series = {{SIGMOD} '09},
        booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
        publisher = {Association for Computing Machinery},
        doi = {10.1145/1559845.1559906},
        url = {https://dl.acm.org/doi/10.1145/1559845.1559906},
        year = {2009}
}

Incoming Citations (Sorted by Pagerank)

Showing 3 of 3 citing papers.

Rank	Citing Paper	Year	Venue	Pagerank
9,080	Processing Moving kNN Queries Using Influential Neighbor Sets	2015	VLDB	5.3251649e-05
9,354	Range-based Obstructed Nearest Neighbor Queries	2016	SIGMOD	5.282937e-05
11,408	Closest Pairs Search Over Data Stream	2023	SIGMOD	5.093636e-05

Outgoing Citations (Sorted by Pagerank)

Showing 7 of 7 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank	Cited Paper	Year	Venue	Pagerank
2	R-Trees: A Dynamic Index Structure For Spatial Searching	1984	SIGMOD	0.0020210012
4	The R*-tree: An Efficient and Robust Access Method for Points and Rectangles	1990	SIGMOD	0.001157935
28	Nearest Neighbor Queries	1995	SIGMOD	0.00052102434
42	The R+-Tree: A Dynamic Multi-Dimensional Index for Objects	1987	VLDB	0.00046170812
1,025	An Efficient and Scalable Approach to CNN Queries in a Road Network	2005	VLDB	0.00012578515
1,281	Continuous Nearest Neighbor Search	2002	VLDB	0.00011349245
3,581	Time-Parameterized Queries in Spatio-Temporal Databases	2002	SIGMOD	7.2873782e-05

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