Open AccessDifference Operators in Simulation Data Warehouses
Author(s) -
Jing Zhao,
Yoshiharu Ishikawa,
Yoshinori Wakita,
Katsuaki Sugiura
Publication year - 2017
Publication title -
journal of disaster research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.332
H-Index - 18
eISSN - 1883-8030
pISSN - 1881-2473
DOI - 10.20965/jdr.2017.p0347
Subject(s) - operator (biology) , computer science , data warehouse , data mining , object (grammar) , domain (mathematical analysis) , spatial analysis , dimensional modeling , mathematics , artificial intelligence , statistics , mathematical analysis , biochemistry , chemistry , repressor , transcription factor , gene
In analyzing observation data and simulation results, there are frequent demands for comparing more than one data on the same subject to detect any differences between them. For example, comparison of observation data for an object in a certain spatial domain at different times or comparison of spatial simulation data with different parameters. Therefore, this paper proposes the difference operator in spatio-temporal data warehouses, which store temporal and spatial observation data and simulation data. The requirements for the difference operator are summarized, and the approaches to implement them are presented. In addition, the proposed approach is applied to the mass evacuation of simulation data in a tsunami disaster, and its effectiveness is verified. Extensions of the difference operator and their applications are also discussed.