摘要
业务化运行的图文办公系统给土地划拨时空数据库的设计提出了新的要求，即不但要记录时空地块状态的变化，还必须描述表达引起变化的原因（审批事件）与变化过程。本文针对这一问题分析了土地划拨过程中审批事件发生的特点及其对时空地块状态变化的影响规律，提出描述层次结构土地划拨事件及其与时空地块状态因果关系的方法，并借鉴主动数据库领域的研究成果对土地划拨事件及其发生过程进行形式化表达。该方法还为此类系统流程控制的实现提供了新的思路，并为其数据库ＣＡＳＥ工具的设计与实现提供了基础。
The spatio temporal database for a collaborative decision making system supporting land subdivision is “event driven”. Both various states of spatial objects and the events cause the objects change need to be recorded and manipulated. To achieve this, the authors analyzed the characteristics of events in land subdivision process and studied how events affect the states of spatial objects. An approach was proposed to represent the land subdivision process and a formal specification language was introduced to describe the execution of event sequence. With this approach, the causal relations between events and states can be recorded and managed in the spatio temporal database in a land subdivision system. And a new way for simulating system work flow was also found.
出处
《测绘学报》
EI
CSCD
北大核心
2000年第1期64-70,共7页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金!(编号:49671061
69833010)资助
关键词
时空数据库
时空目标状态
GIS
土地划拨
spatio temporal database
event driven
state of spatial object
GIS based CSCW system
office GIS
land subdivision
