20260508 13233500 1.0 Inventory_Map_Index 222094.785433 2345213.243110 89767.621063 1654846.219816 1 Projected GCS_North_American_1983_HARN Linear Unit: Foot (0.304800) NAD_1983_HARN_Oregon_Statewide_Lambert_Feet_Intl <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' 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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 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 Inventory_Map_Index 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). The Inventory_Map_Index feature class contains polygons that describe the extent of the original studies included in SLIDO. The Inventory_Map_Index feature class user-defined fields include the original reference, original map scale, and original mapping purpose, that is, if the mapping related to identification of geologic hazards. A full list of the references, original map scales, and reference identification codes (REF_ID_COD) are provided in the References table in this geodatabase. The Inventory_Map_Index feature class is related to the landslide deposit feature class and the References table through the REF_ID_COD field. 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 Deposits Inventory Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus geoscientificinformation Landslide Deposits Inventory 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 -124.806721 -116.419525 46.219009 41.923244 None None Attribute fields were inspected for any duplications or missing references against the completed landslide inventory. Care was taken to fill in any missing information, where possible. Where there are Null values, information was not available or is not applicable to that study. QA/QC included a visual inspection to assure that added study area polygons from studies using DOGAMI SP-42 methods did not overlap previous studies and were in the correct location. Other study area polygons were checked for correct location. For studies not using DOGAMI SP-42 methods, overlap with previous study polygons was allowed. This data set includes study area polygons for all of the landslide inventory studies completed in the state of Oregon up to 2025. Refer to the original source data reports for positional accuracy. Citations for data sources are listed in the attribute table. This dataset does not have a vertical component. For each new study added to the current SLIDO update, the corresponding study area polygon is added to the index map. 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 Inventory_Map_Index REF_ID_COD Unique code assigned by data steward to each original reference map. DOGAMI SCALE Map scale used to digitize or otherwise create landslide data. DOGAMI PURPOSE Purpose for creating landslide data. DOGAMI LIDAR Indicate whether landslide data sets are created using lidar-derived data. DOGAMI SP_42 Indicate whether landslide datasets are created using techniques outlined in Burns and Madin, 2009 (DOGAMI Special Paper 42). DOGAMI DATE Date of landslide data inclusion, from published or unpublished sources. DOGAMI The Inventory_Map_Index feature class contains polygons that describe the extent of the original studies included in SLIDO. The Inventory_Map_Index feature class user-defined fields include the original reference, original map scale, and original mapping purpose, that is, if the mapping related to identification of geologic hazards. A full list of the references, original map scales, and reference identification codes (REF_ID_COD) are provided in the References table in this geodatabase. The Inventory_Map_Index feature class is related to the landslide deposit feature class and the References table through the REF_ID_COD field.