State-Maintained Roadway 10th Milepoints in Kentucky

This feature service provides access to the spatial dataset that represents milepoints, the linear measurements along Kentucky’s road system, spaced at 1/10th-mile intervals. Milepoints serve as a general linear referencing system used to locate roadway characteristics and events. Each milepoint is recorded as a decimal number calculated to three decimal places (thousandths of a mile), or just over 5 feet. All routes in the Highway Information System (HIS) have an inherent topology or directional flow, which is assigned when the route is entered into the system and can be visualized in a GIS program. For divided highways, topology always follows the direction of flow. A cardinal route’s topology always aligns with the cardinal direction, while a non-cardinal route’s topology follows the non-cardinal direction. For interstate highways and state parkways, milepoints start at 0.000 at the beginning of a route—either a state border or the route’s starting point—and increase in the cardinal direction (typically north or east). When a new route ID is assigned at a county line, its starting milepoint matches the highest milepoint of the previous county, meaning not all interstates and parkways begin at 0.000. For all other state-maintained routes, milepoints reset to 0.000 at each county boundary and increase in the cardinal direction until the route ends within that county. In cases where a route begins at a higher-classified roadway (e.g., a county road intersecting a US or KY route), the topology points away from the higher-classified road. Milepoint references in this dataset do not represent the physical locations of posted highway signs. Sign placement is as approximate as possible and may differ from actual 1/10th mile interval designations in this dataset. Data Download: https://ky.app.box.com/s/vjnpfaai073v2guy72megpu0olpmm1ru本要素服务可访问用于表示里程桩（milepoint）的空间数据集。里程桩为肯塔基州道路系统沿线的线性测量标识，按每0.1英里间隔布设，作为通用线性参考系统用于定位道路特征与道路事件。每个里程桩以保留三位小数的十进制数值记录，对应千分之一英里（即略多于5英尺）。 公路信息系统（Highway Information System, HIS）中的所有道路均具备固有拓扑结构或通行流向，该属性在道路录入系统时完成设定，并可在地理信息系统（Geographic Information System, GIS）中可视化展示。对于双向分隔式公路，拓扑结构始终与通行流向保持一致。主方位道路的拓扑结构始终与主方位方向对齐，而非主方位道路的拓扑结构则遵循其对应非主方位走向。 针对州际公路与州级公园道，里程桩从道路起点（州界或道路起始点）的0.000位置开始，沿主方位方向（通常为北或东）递增。当在县界处分配新的道路ID时，该道路的起始里程桩数值与前一县境内道路的最高里程桩数值一致，这意味着并非所有州际公路与公园道均以0.000作为起始点。 对于其余所有由州政府维护的道路，里程桩会在每个县界处重置为0.000，并沿主方位方向递增，直至该道路在本县境内终止。若某道路起始于高等级道路（例如与美国国道或肯塔基州道相交的县道），则其拓扑方向背离该高等级道路。 本数据集内的里程桩参考值并不等同于实际布设的公路里程牌的物理位置。公路里程牌的布设仅为近似设置，可能与本数据集内标注的每0.1英里间隔的位置存在偏差。 数据下载地址：https://ky.app.box.com/s/vjnpfaai073v2guy72megpu0olpmm1ru