Toward a 3 D Moving Object Data Model - A Preliminary Consideration - Yoshifumi

This paper irivestigcites n iiew &tu model for the renlizariori of a t~irt?e-diiri~.rrsional(3D) m~ring,olrject duiuhase system. {ti contrmt to the trfldh'onal apprnach, i# rmi deal with spotiu-temporal chamcteristics of rrinviiig 06jects irt !hi! 313 spout.. A spatio-tempcwul sarripliwg tiiuory is iritmdiced thut eiiables a dafuhuse systerii to s t r m mid nirmipulo l e a 1 I of ihc n ecessaiy . v p tiotempo i 0 1 iufotttirtioJi a bo i r t moving objecls. 7he 3D nroviwg drjeur rlutubase consist^^ oj'three kirrds of relntiotis: a ,set oj'priniary rdatiorrs, sircli C I S I-lUSI, ORi, GRAD, mid S f M P E , store all the esserrfial spatio-trmpolal featiws of a single rwving object; n set of built-in derived rebtions, siich as IMR, S P E H I , TRACK U N : MDIR, and TOPOL, stow, f o r example, ~lte moving direction of u s ingle object (DIR) (lad the tnpoln~ical rclition bctwceri levo objecis (TOPOL): crtrd a sei uf userd e j w d rehioris sitch CIS BACK atid FRONT with which i m e can issire c1 vuriep r,f spatin-renapowl qrjeries nit rmvitig objects. A doni& relutiorral calculus-hased rtioving object query langirrrge named MOQL is show.