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please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx 2025 ArcGIS Metadata 1.0 Oregon Department of Geology and Mineral Industries 1 971 673 1555 1 971 673 1562 800 NE Oregon Street Suite 965 Portland Oregon 97232 US dogami-info@dogami.oregon.gov When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx "GDB" Esri File Geodatabase https://www.oregon.gov/dogami/pages/default.aspx Scarps 2025 Oregon Department of Geology and Mineral Industries Oregon Department of Geology and Mineral Industries Portland, Oregon, USA vector digital data Oregon Department of Geology and Mineral Industries Digital Data O-25-08 Statewide Landslide Information Database for Oregon Release-4.6 (SLIDO-4.6) Many parts of Oregon are highly susceptible to landslides which pose significant threats to people and infrastructure particularly in the portions of the state with moderate to steep slopes. As population growth expands and development onto landslide susceptible terrain occurs, greater losses are likely to result. Most of Oregons landslide damage has been associated with severe winter storms where landslide losses exceed $100 million in direct damage (such as the February 1996 eventsee FEMA, 1996). However, landslides are a chronic hazard in Oregon and annual average maintenance and repair costs for landslides in Oregon are over $10 million (Wang and others, 2002). Landslides induced by earthquake shaking are likely in many parts of Oregon, and losses associated with sliding in moderate-to-large earthquakes are likely to be significant. Volcanic induced and/or associated landslide hazards are also potential threats to parts of Oregon. In order to reduce risk from landslides, information about the hazard must be readily available. In 2007, research at the Oregon Department of Geology and Mineral Industries (DOGAMI) was performed to choose the best remote sensing dataset (i.e. aerial photos, photogrammetric elevation data, lidar elevation data, etc.) to use as a primary tool to begin systematic mapping of landslides in Oregon. The use of lidar topographic data was deemed necessary for the understanding and mapping the landslide hazard in Oregon. The second conclusion of this study was to systematically compile all previously mapped landslides from geologic and hazard maps. This database (Statewide Landslide Information Database of Oregon, SLIDO) would then serve as a starting place for all future landslide studies (Burns, 2007). This feature class represents lines of the uppermost extent of landslide head scarp and any internal scarps within the body of the landslide. The landslide inventory is intended to provide users with basic information regarding landslides. The geologic, terrain, and climatic conditions that led to landslides in the past may provide clues to the locations and conditions of future landslides, and it is intended that this data will provide useful information to develop regional landslide susceptibility maps, to guide site-specific investigations for future developments, and to assist in regional planning and mitigation of existing landslides. Partially funded by the Federal Emergency Management Agency (FEMA) Hazard Mitigation Grant Program (HMGP) Oregon Department of Geology and Mineral Industries 1 971 673 1555 1 971 673 1562 800 NE Oregon Street Suite 965 Portland Oregon 97232 US dogami-info@dogami.oregon.gov When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx William J. Burns Oregon Department of Geology and Mineral Industries United States North America Oregon Baker Benton Clackamas Clatsop Columbia Coos Crook Curry Deschutes Douglas Gilliam Grant Harney Hood Jackson Jefferson Josephine Klamath Lake Lane Lincoln Linn Malheur Marion Morrow Multnomah Polk Sherman Tillamook Umatilla Union Wallowa Wasco Washington Wheeler Yamhill Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus soil surface alluvium sediment Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus geoscientificinformation ISO 19115 Topic Category landslide scarp geologic hazard Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus geoscientificinformation landslide scarp geologic hazard soil surface alluvium sediment United States North America Oregon Baker Benton Clackamas Clatsop Columbia Coos Crook Curry Deschutes Douglas Gilliam Grant Harney Hood Jackson Jefferson Josephine Klamath Lake Lane Lincoln Linn Malheur Marion Morrow Multnomah Polk Sherman Tillamook Umatilla Union Wallowa Wasco Washington Wheeler Yamhill REPORT DATA: This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information. This publication cannot substitute for site-specific investigations by qualified practitioners. Site-specific data may give results that differ from the results shown in the publication. See the accompanying text report for more details on the limitations of the methods and data used to prepare this publication. Although these data have been processed successfully on a computer system at the Oregon Department of Geology and Mineral Industries, no warranty expressed or implied is made by DOGAMI regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Statewide Landslide Information Database for Oregon Release-4.6 (SLIDO-4.6) 2025 "4.6" Oregon Department of Geology and Mineral Industries Oregon Department of Geology and Mineral Industries Portland, Oregon, USA Oregon Department of Geology and Mineral Industries Digital Data O-25-08 https://www.oregon.gov/dogami/pages/default.aspx true -124.800535 -118.588006 46.241191 41.987368 None None No relevant fields in attribute table. All scarps were checked for duplicates and an association with a landslide deposit. The Scarps feature class is a complete compilation of all landslide head scarp and internal scarp lines within the state of Oregon (see accompanying report for sources); with the exceptions of landslides that are smaller than 100 square meters (1,075 square feet) which may not be identified due to the resolution of the lidar data and air photos used in this project area. Only deposits created using DOGAMI Special Paper 42, lidar-based methods will have their head scarps mapped. The landslide polygons in this data set were captured by heads up digitizing at many different scales. For more information about horizontal positional accuracy, consult the original study. The landslide polygons in this data set were captured by heads up digitizing at many different scales. For more information about vertical positional accuracy, consult the original study. This data set is a statewide inventory of mapped landslide deposits, compiled from numerous studies. The original studies vary widely in scale, scope and focus which is reflected in the wide range of accuracy, detail, and completeness with which landslides are mapped. This data was prepared using a wide variety of interpretation methods, including aerial photos, field work, map digitizing, and methods following the Protocol for Inventory Mapping of Landslide Deposits from Light Detection and Ranging (Lidar) Imagery developed by Burns and Madin (DOGAMI Special Paper 42, 2009). In the Special Paper 42, the three primary tasks include compilation of previously mapped landslides, lidar-based morphologic mapping of landslide features, and review of aerial photographs. Landslides identified by these methods are digitally compiled into this database at varying scales. The recommended map/use scale for these data is 1:8,000. Each landslide is also attributed with classifications for activity, depth of failure, movement type, and confidence of interpretation. Oregon Department of Geology and Mineral Industries 1 971 673 1555 1 971 673 1562 800 NE Oregon Street Suite 965 Portland Oregon 97232 US dogami-info@dogami.oregon.gov When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx Burns and Madin, 2009 Protocol for Inventory Mapping of Landslide Deposits from Light Detection and Ranging (Lidar) Imagery Burns and Madin, 2009 2009 Oregon Department of Geology and Mineral Industries Oregon Department of Geology and Mineral Industries Portland, Oregon, USA Not Applicable Oregon Department of Geology and Mineral Industries Special Paper SP-42 https://pubs.oregon.gov/dogami/sp/p-SP-42.htm 2009 Scarps REF_ID_COD Unique code assigned by data steward to each original reference map. DOGAMI This feature class represents lines of the uppermost extent of landslide head scarp and any internal scarps within the body of the landslide.