Bridges

Polygons representing the footprint of bridges and overpasses in Portland. The attribute information includes details on the owner, maintainer, type of bridge, and seismic information. -- Additional Information: Category: Transportation - Assets Purpose: For mapping and analysis related to the maintenance and management of bridges and overpasses in Portland. Update Frequency: Weekly -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=52776本数据集以多边形（Polygon）要素表征波特兰市内桥梁与高架道路的空间覆盖范围，其属性信息包含桥梁所有者、维护方、桥梁类型以及抗震相关细节。—— 附加信息：分类：交通-资产；用途：用于波特兰市内桥梁与高架道路的维护与管理相关制图与分析；更新频率：每周；元数据链接：https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=52776