摘要
提出公共交通线路及站点在GIS中的详细数据表达问题 ,并探讨该数据模型在公交换乘中的应用 .通过分析大城市公共交通线路及站点的实际状况论证了详细的公交实体表达的必要性 .基于实体模型分析及动态分段技术 ,现有普通的公交线路及站点模型得到延伸 .这种更详细的模型体现在线路的分方向表达和站点的精确位置描述 .公交实体可通过独立或非独立方式实现与基础路网的关联 ,这些关联均可实现最优公交线路的搜索 .在实际应用中 ,出行者关心的是如何最佳地完成其旅行 ,即需要详细的出行指导 .公交换乘是公交出行指导的重要组成部分 。
This paper deals with the detailed representation of transit lines and stops in GIS, and explores the application of this representat ion to transit transfer guidance. The need for detailed representation of public transport features is illustrated by cases existing in large cities. Based on o bject-oriented analysis and dynamic segmentation, the traditional line and stop models are extended to allow representations of directional routes and individu al locations of route stops. The representations make use of dependent or indepe ndent methods with reference to road networks. In real situation, transit travel lers need clear trip guidance, in which transit transfer plays an important part . The process and problems of generating transfer scenario from the detailed rep resentation of transit routes and stops are described and discussed. It is argue d that the detailed data representation has to be incorporated into a more compr ehensive data framework for an advanced transit traveller information system.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2003年第3期69-75,共7页
Engineering Journal of Wuhan University
基金
国家自然科学基金重点项目资助 (编号 :5 0 2 380 10 )
关键词
公共交通
数据表达
出行指导
GIS
动态分段
transit
data representation
trip guidance
geograph ic information system (GIS)
dynamic segmentation
