City of Portland, OregonDisplays polygons for Cartographic reference -- Additional Information: Category: Collection System Purpose: Used to identify information relevant to Collection System that's not an asset. Update Frequency: Weekly -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=54326ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/3431833177db426db0cee5be46aa0bd6_109engPortlandMaps Open DataPublicCollection System Cartographic Features - Polys [Oregon--Portland]Web servicesOregon--PortlandOregonLast Modified: 2026-01-07