Close Pair Queries in Moving Object Databases Panfeng Zhou, Donghui Zhang, Betty Salzberg, Gene Cooperman, and George Kollios   View Paper (PDF)   Return to Session 1: Moving Objects Abstract Databases of moving objects are important for air traffic control, ground traffic, and battlefield configurations. We introduce the (historical and spatial) range close-pair query for moving objects as an important problem for such databases. The purpose of a range close-pair query for moving objects is to find pairs of objects that were closer than å during time interval $I$ and within spatial range R, where å, I and R are user-specified parameters ©2006 Association for Computing Machinery