基于公路线形特征的线性参照系及其应用

Linear Referencing System Based on Road Line-shape and Application

提出了一种考虑公路线形特征的线性参照系,旨在解决公路数据库中空间数据冗余、公路事件在小比尺电子地图上容易偏离公路等问题.通过识别公路线形、压缩冗余数据和分配线性坐标来建立线性参照基准,建立相应的线性参照算法,动态建立公路事件与二维大地坐标间的联系.在公路管理中的实际应用表明,此种参照系具有简便易行和精度高的特点,能够较好地满足实际工程要求.

In this paper, a linear referencing system based on road line - shape is presented in order to reduce spatial data redundancy and protect road event from going out of road range. By identifying road line - shape, cutting down redundant data and distributing linear coordinate, a linear referencing datum and corresponding algorithm are built up, dynamically establishing the link between road event and 2 - D earth coordinate. It has been proved in practice that the referencing system is easy to operate and possesses high precision, meeting the needs of practical engineering.