Sidewalks 2023

All public walkways are captured. Sidewalks do not overlap other feature classes unless they are hidden under a bridge or overpass. Cement pads around public swimming pools are captured. Walkways in common areas of apartments, college campuses, and business parks are captured as sidewalks. Individual resident sidewalks are not captured. Sidewalk: Sidewalks either compiled photogrammetrically as polygons or derived from a combination of vectors including: curbs, buildings, walls, driveways, or other features. Any stair feature that is less than 5 stairs is coded as sidewalk to maintain continuity. Hidden Sidewalk: Sidewalks that are obscured by overpasses or tunnels. They are not fully visible in an aerial photograph, but the location can be interpreted based on the information visible on either side of the bridge. Stairs: Groups of 5 or more stairs outside of major buildings or monuments, as well as part of sidewalks. Individual stairs are not captured. If landings exist within stairs, they are captured as sidewalk, not stairs. Crosswalk: Marked crosswalks that are fully visible in an aerial photograph.所有公共通行步道均已完成采集。人行道（sidewalk）不得与其他要素类重叠，除非其隐于桥梁或天桥下方。公共泳池周边的水泥平台均已采集。公寓、大学校园及产业园区公共区域内的通行步道均按人行道类采集，居民私有步道不予采集。 人行道（sidewalk）：可通过摄影测量法以面要素形式矢量化生成，或由路缘石、建筑、墙体、车道及其他要素的矢量数据组合衍生而来。台阶数少于5级的梯道均归类为人行道，以保障要素连续性。 隐式人行道（Hidden Sidewalk）：被天桥或隧道遮蔽的人行道。此类步道无法在航空影像中完全显现，但可通过桥梁两侧可见信息推断其位置。 台阶（Stairs）：大型建筑或纪念性建筑外的5级及以上梯道，以及作为人行道组成部分的梯道。单级台阶不予采集；若梯道间设有休息平台，平台按人行道而非台阶类采集。 人行横道（Crosswalk）：航空影像中完全可见的施划式人行横道。