City of Portland, OregonRegional stream centerline dataset. Reference sources include 2004 through 2007 LiDAR data, aerial photos, and the mapped stormwater collection system. This data can be viewed online at www.PortlandMaps.com. -- Additional Information: Category: Hydro Purpose: For mapping the location of stream centerlines. Update Frequency: As Needed -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=53227ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/c3d43b153dd441efb4b0d2ab66d2ae8d_128engPortlandMaps Open DataPublicStream Centerlines [Oregon--Portland]Web servicesOregon--PortlandOregonLast Modified: 2025-11-15