Geologic Hazards

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.

Data and Resources

Additional Info

Field Value
Source https://gis-fema.hub.arcgis.com/apps/PDX::geologic-hazards
Version
Author
Author Email
Maintainer
Maintainer Email
Shared (this field will be removed in the future) Open
IB1 Sensitivity Class
IB1 Trust Framework
IB1 Dataset Assurance
IB1 Trust Framework
GUID https://www.arcgis.com/home/item.html?id=0aafd41ec7f845078162f0cdfe4c33b6
Language
dcat_issued 2016-06-16T17:15:11.000Z
dcat_modified 2019-11-01T18:48:55.000Z
dcat_publisher_name City of Portland, Oregon
ib1_trust_framework []