Yutaka OHSAWA


Safe-Region Generation Method for Versatile Continuous Vicinity Queries in the Road Network Distance
Tin Nilar WIN Htoo HTOO Yutaka OHSAWA 
Publication:   
Publication Date: 2018/02/01
Vol. E101-A  No. 2  pp. 472-480
Type of Manuscript:  PAPER
Category: Intelligent Transport System
Keyword: 
location based servicescontinuous queriessafe-regionroad network distance
 Summary | Full Text:PDF(813.7KB)

Incremental Single-Source Multi-Target A* Algorithm for LBS Based on Road Network Distance
Htoo HTOO Yutaka OHSAWA Noboru SONEHARA Masao SAKAUCHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2013/05/01
Vol. E96-D  No. 5  pp. 1043-1052
Type of Manuscript:  Special Section PAPER (Special Section on Data Engineering and Information Management)
Category: Spatial DB
Keyword: 
A* algorithmroad networkPOI queryincremental Euclidean restriction
 Summary | Full Text:PDF(627.7KB)

A Geographic Differential Script File Method for Distributed Geographic Information Systems
Kyungwol KIM Yutaka OHSAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1999/01/25
Vol. E82-D  No. 1  pp. 113-119
Type of Manuscript:  Special Section PAPER (Special Issue on New Generation Database Technologies)
Category: Spatial and Temporal Databases
Keyword: 
geographic information systemdifferential script filedigital maprevision management
 Summary | Full Text:PDF(286.6KB)