移动空间数据类型和操作的初步研究

1 引言移动空间对象是随时间变化的空间数据,由时空数据库(Spatio-Temporal Databases)进行管理和处理。一个空间点可能随时间而改变其位置,为了完整地反映该点的信息,数据库中应该存储该点的全部历史信息,这个空间对象就是一个移动点。同理,一个区域也可能随时间移动、扩大或缩小。时空现象在现实生活中非常普遍,如飞机航行时随着时间变化而改变它的空间位置,这飞机就是一个移动点;当森林中某处发生火灾时,火灾区就是一个空间对象:区域。该区域可能

Primary Research on Moving Spatial Data Types and Operators

Spatio-temporal databases deal with geometries changing over time, or moving spatial objects. In this paper, research status on moving spatial objects have been reviewed. Data types and operators of moving spatial objects are also analysised and discussed. And we propose the abstract data type (ADT) approach to develop spatio-temporal DBMS. in which we first implement an ADT mechanism supporting for spatio-temporal data types, and then integrate it with the extensible DBMS to generate the spatio-temporal DBMS.