West Virginia Routes

The general rule for route dominancy is: among all concurrent routes, the route with the lowest sign system code dominates. If more than one route shares the same lowest sign system code the one with the smallest route number dominates. Measures embedded in routes are derived by linear interpolation based on calibration point data collected by using a Distance Measuring Instrument (DMI) except for ramps which use the geometry length to derive measures. Collection of all WV Routes designated Sign System 3 in the Linear Referencing System as extracted from the Dominant Routes Layer in West Virginia. Current feature information included in this layer is the ROUTEID, Label, Sub Route, Sign System, Supplemental Code, Route Number, County Code, District, Beginning Mile Point, Ending Mile Points, Comments, Year Recorded and State Code. Data is in NAD_1983_UTM_Zone_17N coordinate system. Data is updated semi-annually.路径主导性的通用规则如下：在所有并发路径中，标识系统代码最低的路径占据主导地位。若存在多条共享同一最低标识系统代码的路径，则路径编号最小的路径占据主导地位。路径内嵌的各类度量指标，除坡道采用几何长度推导外，其余均基于距离测量仪（Distance Measuring Instrument, DMI）采集的校准点数据，通过线性插值法计算得到。本数据集提取自西弗吉尼亚州主导路径图层（Dominant Routes Layer）中的线性参考系统（Linear Referencing System），包含所有被指定为标识系统3的西弗吉尼亚州（WV）路径。该图层当前包含的要素属性信息包括：ROUTEID（路径ID）、Label（标签）、Sub Route（子路径）、Sign System（标识系统）、Supplemental Code（补充代码）、Route Number（路径编号）、County Code（县代码）、District（辖区）、起始里程点、结束里程点、Comments（备注）、Year Recorded（记录年份）以及State Code（州代码）。数据采用NAD_1983_UTM_Zone_17N坐标系。数据每半年更新一次。