Historic Trolley Routes

Imported from an unknown CAD source, this polyline dataset delineates the routes of historical trolley lines, which have since been abandoned or removed. The data is not maintained, and offered as-is. -- Additional Information: Category: Transportation - Right of Way Management Purpose: Delineate known historical trolley lines. Update Frequency: Not Maintained -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=53242本折线数据集源自未知计算机辅助设计（CAD）源文件，用于描绘现已废弃或拆除的历史有轨电车线路轨迹。本数据未进行维护，按现状提供。 -- 附加信息： 分类：交通运输 - 通行权管理 用途：标注已知历史有轨电车线路轨迹 更新频率：无维护机制 -- 元数据（Metadata）链接：https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=53242