| 一种新的线性参照系统数据模型 |
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| 引用本文： | 童小华,杨东援,刘大杰. 一种新的线性参照系统数据模型[J]. 同济大学学报(自然科学版), 2001, 29(4): 410-415 |
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| 作者姓名： | 童小华 杨东援 刘大杰 |
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| 作者单位： | 同济大学测量与国土信息工程系, |
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| 基金项目： | 高等学校重点实验室访问学者基金资助项目；国家自然科学基金资助项目(49671065) |
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| 摘 要： | 提出了用于交能运输地理信息系统（GIS-T）的一种新的线性参照数据模型。在分析了线性参照系统概念模型的基础上，对其中两个关键问题进行了研究，即基于道路几何特征的线性参照基准模型和基于道路曲线要素的动态分段模型。同时，以实例说明该模型在GIS-T原型系统中用于公路事故分析的应用。
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| 关 键 词： | 线性参照系统 线性参照基准 动态分段 平差模型 交通运输地理信息系统 数据模型 事故分析 |
| 文章编号： | 0253-374X(2001)04-0410-06 |
| 修稿时间： | 2000-02-22 |
Development of a NewLinear Referencing System Data Model |
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| TONG Xiao hua ,,YANG Dong yuan ,LIU Da jie. Development of a NewLinear Referencing System Data Model[J]. Journal of Tongji University(Natural Science), 2001, 29(4): 410-415 |
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| Authors: | TONG Xiao hua YANG Dong yuan LIU Da jie |
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| Affiliation: | TONG Xiao hua 1,2,YANG Dong yuan 1,LIU Da jie 1 |
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| Abstract: | In this paper, a new data model for a linear referencing system in geographic information systems for transportation (GIS*.T) is presented. The newly developed data model has the advantage of generality and high precision. The conceptual data model of a linear referencing system is firstly analyzed, and then two key problems constructing a linear referencing model are investigated. The development of a road geometric featureoriented linear referencing datum is presented with least square adjustment method. An improved road curve feature oriented dynamic segmentation model is further presented. Based on the theoretical studies, a GIS*.T prototype system is developed. The implementation of the model in the prototype system is illustrated to support highway accident management and analysis. |
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| Keywords: | linear referencing system linear referencing datum dynamic segmentation adjustment model geographic information systems for transportation |
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