This map depicts three distinct types of Geologic Hazards. Earthquake Hazards shows the two most likely earthquake scenarios for our area -- Cascadia Subduction Zone M9.0 and Portland Hills Fault M6.8 earthquakes, Perceived Shaking and Damage Potential, from DOGAMI OFR-18-02. Steep Slopes are polygons representing slopes greater than or equal to 20% in the Portland Bureau of Environmental Services topographic watershed boundary area. Derived from 2014, reclassified, 1' resolution LiDAR bare-earth digital elevation model (DEM). All slopes average over a horizontal distance of 15'. Minimum area of contiguous slope is approximately 1/2 acre. Polygons were created, generalized and smoothed in ArcGIS 10.3.1 and ArcGIS Pro. DOGAMI Landslide Inventory consists of polygons delineating landslide deposits (including debris flow fans and talus extent), from DOGAMI IMS-57.
L o a d i n g
Organization
The Federal Emergency Management Agency (FEMA) - view all
Update frequencyunknown
Last updated6 days ago
OverviewCGISPDXearthquakefloodhazardlandslidemapportlandmapspublic appsteep slope
Additional Information
KeyValue
Dcat Issued2016-06-16T17:15:11.000Z
Dcat Modified2023-07-25T18:14:15.000Z
Dcat Publisher NameCity of Portland, Oregon
Guidhttps://www.arcgis.com/home/item.html?id=0aafd41ec7f845078162f0cdfe4c33b6
Harvest Object Idddb8d582-fe78-450a-9b08-efee5c207829
Harvest Source Idc1a598fe-7ea3-4439-b59b-1cec8cd782a0
Harvest Source TitleFEMA Geospatial Resource Center Data Catalog
