WSDOT - Palouse River and Coulee City Rail System - Linear Reference System

PCC Lines are shown by major branch lines. This data is used as 1) a linear referencing system (LRS); 2) for locating features on the PCC system by milepost value. PCC lines were built using existing data sources including railroad line track charts, track right-of-way maps, and recently digitized linework based off aeiral photos. In LRS, the locations of both data and events are determined according to their distance along a railroad line from some known point (e.g., the beginning of the line or line segment, a mile marker, a junction with another rail line, or a railroad crossing).PCC线路以主要支线形式展示。本数据集可用于两大场景：其一，作为线性参考系统（Linear Referencing System, LRS）；其二，依托里程桩值对PCC系统内的地物开展定位工作。PCC线路基于现有数据源构建，数据源包含铁路线路轨道图表、铁路用地界地图，以及近期基于航空照片数字化得到的线路矢量数据。在线性参考系统中，各类数据与事件的位置均通过其沿铁路线至某一已知点的距离确定，已知点包括线路/线段起点、里程标、与其他铁路线路的交汇点，以及铁路平交道口。