Structure Location Points 26.1

Abstract: This feature class consists of approximately 42,000 features which represent physical structures that Interstate, Primary, Secondary and Urban roads travel under or over on all Virginia Department of Transportation maintained roadways. The Linear Referencing System is based on the Virginia Department of Transportation's source system of record for road inventory, the Roadway Inventory Management System (RIMS). Geometry and Attribution: The dynamically generated points contained within this feature class portray the beginning of structures represented on the master route in the prime and the end of structures in the non-prime directions of travel. All point locations are positioned on Linear Referencing System geometry based on latitudinal and longitudinal coordinates initially obtained from heads-up digitizing in the Geographic Information System. Structure coordinates are currently maintained in the Roadway Network System by the Structures and Bridge Division. Features on or along the road (culverts, bridges, tunnels, parallel footbridges, etc…) and also features crossing the road (overpasses, culverts, perpendicular foot bridges, etc.) are depicted in this data. Business attributes for all features are derived from Pontis (Bridge Management System), the structure source system of record. Purpose: This feature class serves as the Structure and Bridge Division's spatial reference allowing BrM (Bridge Management System) data to be viewed, analyzed and mapped within Geographic Information System applications.摘要：本要素类包含约42000个要素，对应弗吉尼亚州交通运输厅（Virginia Department of Transportation）养护的全部道路上，州际公路、干线公路、次级公路及城市道路所下穿或上跨的实体构筑物。本数据集所采用的线性参考系统（Linear Referencing System），基于弗吉尼亚州交通运输厅的道路库存权威源系统——道路库存管理系统（Roadway Inventory Management System, RIMS）构建。 几何与属性信息：本要素类内的动态生成点，用于表征主行驶方向下主路线中构筑物的起点，以及次行驶方向下构筑物的终点。所有点位均基于地理信息系统中通过屏幕数字化获取的经纬度坐标，匹配至线性参考系统的几何要素上。当前，构筑物与桥梁分部通过道路网络系统对构筑物坐标进行维护。本数据涵盖道路上或沿路分布的要素（如涵洞、桥梁、隧道、平行人行桥等），以及横跨道路的要素（如立交桥、涵洞、垂直人行桥等）。所有要素的业务属性均来源于构筑物的权威源系统——庞蒂斯桥梁管理系统（Pontis Bridge Management System, Pontis）。 用途：本要素类作为构筑物与桥梁分部的空间参考系，可支持在地理信息系统应用中对桥梁管理系统（Bridge Management System, BrM）数据进行查看、分析与制图。