scholarly journals Multiple range query optimization in spatial databases

Author(s):  
Apostolos N. Papadopoulos ◽  
Yannis Manolopoulos
2014 ◽  
Vol 21 (1) ◽  
pp. 190-198 ◽  
Author(s):  
Sayar Ahmet ◽  
Pierce Marlon ◽  
Fox C. Geoffrey

2019 ◽  
Vol 23 (1) ◽  
pp. 79-104
Author(s):  
Eduardo Mella ◽  
M. Andrea Rodríguez ◽  
Loreto Bravo ◽  
Diego Gatica

2016 ◽  
Vol 2016 ◽  
pp. 1-12
Author(s):  
Yongshan Liu ◽  
Dehan Kong

Present research of visible query focuses on points and segments in two-dimensional space, while disfigurements occur during processing of visible query in three-dimensional space. In this paper, Continuous Visible Range Query Based on Control Point (CVRQ-CP) is proposed to solve the visible query in a 3D spatial database. Firstly, the horizontal angle (HA) and Vertical Projection Angle (VPA) for 3D objects in a spatial database were used in the visibility testing method. The HA and VPA in the processing of the continuous visible query created visibility changes, defining and confirming the control point. Finally, the algorithm of Continuous Visible Range Query Based on Control Point (CVRQ-CP) was proposed. Verified by experiments, the CVRQ-CP algorithm correctly deals with the visible query of 3D spatial objects. The CVRQ-CP algorithm has better superior accuracy over present visible queries in 3D spatial databases.


2018 ◽  
Vol 22 (1) ◽  
pp. 125-151
Author(s):  
Wei Ge ◽  
Xianxian Li ◽  
Chunfeng Yuan ◽  
Yihua Huang

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