DeLong, Stephen B. Engle, Zachary T. Hammer, Morena N. Jennings, Carrie E. Gran, Karen B. Bartley, Julie K. Blumentritt, Dylan J. Breckenridge, Andrew J. Day, Stephanie Larson, Philip H. McDermott, Jeni A. Triplett, Laura D. Wickert, Andrew D. Richard, Emilie, M. Swanson, Melissa A. Allison, Matthew Dahlseid, Aidan Dahly, Derek T. Dean, Brian A. Endres, Matt Kurak, Ethan Link, Sophia Matti, Blake Rehwinkel, Rayann W. Sockness, Brian VanBerkel, Jordan Willard, Jack G. Williams, Andrew B. 20211222 ESRI file geodatabase (*.gdb) Moffett Field, CA U.S. Geological Survey https://doi.org/10.5066/P94KF6OM This dataset contains an inventory of landslides in many of the most landslide-prone parts of Minnesota. This project was created to improve our understanding of the landslide hazard in Minnesota and to provide a nearly statewide base map of landslide data. The mapping was performed by geologists from the U.S. Geological Survey, the Freshwater Society, and several academic institutions where undergraduate students, graduate students and faculty performed mapping. Contributing academic institution include the University of Minnesota Duluth, the University of Minnesota Twin Cities, the University of Wisconsin-Superior, Gustavus Adolphus College, Winona State University, Minnesota State University, Mankato, St. Thomas University, and North Dakota State University. These landslides were identified using several methods. These include analysis of historical records, direct field observation, location using satellite or aerial imagery, and identification in topographic data products derived from the statewide lidar data coverage. Most of the mapped landslides were identified using lidar derivatives and have not been evaluated in the field by geologists or engineers. These data should be considered a preliminary survey and are not intended to represent a complete and accurate inventory of landslides for these areas. There may be a range in the accuracy, detail, and completeness with which landslides are mapped, and in the information associated with a given landslide; however, all mapped landslides were reviewed by USGS personnel and the senior project members. Mapping procedures including the assignment of numerical values for confidence follow guidelines found in DOGAMI Special Paper 42: https://www.oregongeology.org/pubs/sp/p-SP-42.htm. Site-specific investigations should be completed before using these data for land development or management decisions. This Data Release consists of: 1) Minnesota_Landslides_v1_1.gdb.zip which contains the landslide inventory mapping data and the areas that were mapped, to be used in a GIS, 2) Minnesota_Landslides_v1_3.sd which is an ESRI service layer definition file that enables use of the data in online and offline GIS, 3) MN_Landslide_Photos.zip that contains a collection of geotagged photos showing landslides; these can be imported into a GIS, and 4) metadata.xml which contains metadata for all included files. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. These data were collected to present an overview of the distribution of landslides in many of the most landslide-prone areas of Minnesota. 2021 publication date Complete None planned -97.425122070106 -88.943676757944 49.406268652428 43.319917526659 USGS Thesaurus elevation USGS Metadata Identifier USGS:61439ca0d34e0df5fb951655 GNIS Minnesota none none Stephen B DeLong SOUTHWEST REGION: EARTHQUAKE SCIENCE CENTER Supervisory Research Geologist mailing and physical

350 North Akron Road

Moffett Field CA 94035 US 651-356-4102 sdelong@usgs.gov Funding for this project was provided by the Minnesota Environment and Natural Resources Trust Fund as recommended by the Legislative-Citizen Commission on Minnesota Resources (LCCMR), and from the U.S. Geological Survey Landslide Hazards Program. No formal attribute accuracy tests were conducted No formal logical accuracy tests were conducted Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. No formal positional accuracy tests were conducted No formal positional accuracy tests were conducted Minnesota Department of Natural Resources 2012 Raster Saint Paul, MN Minnesota Department of Natural Resources https://www.mngeo.state.mn.us/chouse/elevation/lidar.html lidar elevation data 20080101 20121108 2012 MN statewide lidar Elevation data for development of map products from which landslides were mapped Minnesota Department of Natural Resources 2012 Vector Saint Paul, MN Minnesota Department of Natural Resources https://www.mngeo.state.mn.us/USNG/maps.html Vector 20120920 20120921 2012 USNG 10k grid This grid system is used to generate the Unique IDs (SLIDE_UNIQUE_ID) of the landslides in this data release Polygons were digitized using ESRI GIS software. 2021 Minnesota Vector Universal Transverse Mercator 15 0.996 -93.0 0.0 500000.0 0.0 coordinate pair 1.0 1.0 METERS North American Datum 1983 (NAD83) Geodetic Reference System 80 (GRS80) 6378137.0 298.257 historic_landslide_points Locations of landslides that were either observed, or recorded in historical records Producer-defined OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. Esri Coordinates defining the features. SLIDE_UNIQUE_ID Unique ID assigned to landslide based on U.S. National Grid System Producer-defined An alphanumeric code consisting of grid location in U.S. National Grid System and a unique number DATA_SOURCE Source of information regarding the landslide Producer-defined text description LOCATION_METHOD Description of how a location was assigned to the landslide Producer-defined Descriptive text NAME_SLIDE An informal name for a landslide Producer-defined Descriptive text DATE_SLIDE Estimated date of occurrence of landslide Producer-defined Text description of most likely date of occurrence of landslide CLASS_SLIDE Type of landslide Producer-defined Text description of the type of landslide DAMAGES A text description of any damages that occurred as a result of the landslide Producer-defined Descriptive text INVESTIGATOR Name of person who identified landslide Producer-defined Name of person CONFIDENCE_CLASS_SLIDE The level of confidence that the landslide is classified correctly in CLASS_SLIDE Producer-defined Low (=<10) Low confidence Producer-defined Moderate (11-29) Moderate confidence Producer-defined High (=>30) High confidence Producer-defined CONFIDENCE_LOCATION Confidence that the slide is located correctly Producer-defined Low (=<10) Low confidence Producer-defined Moderate (11-29) Moderate confidence Producer-defined High (=>30) High confidence Producer-defined DESCRIPTION_COMMENTS Text comments, may not be interpretable to end-user Producer-defined Descriptive text deposits_polygons Areas of landslide deposits Authors OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. Esri Coordinates defining the features. SLIDE_UNIQUE_ID Unique ID assigned to landslide based on U.S. National Grid System Producer-defined An alphanumeric code consisting of grid location in U.S. National Grid System and a unique number SHAPE_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. SHAPE_Area Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. headscarp_flanks_polygons Locations of landslide headscarps and flanking scarps. These may contain landslide deposits Authors OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. Esri Coordinates defining the features. SLIDE_UNIQUE_ID Unique ID assigned to landslide based on U.S. National Grid System Producer-defined An alphanumeric code consisting of grid location in U.S. National Grid System and a unique number SHAPE_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. SHAPE_Area Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. DEPOSIT An identifier of a deposit associated with this scarp Producer-defined Values indicate the SLIDE_UNIQUE_ID of the corresponding landslide deposit. This is indicated because some landslide deposits are connected to multiple scarp polygons scarps_lines Lines that indicate the locations of scarps associate with landslides Authors OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. Esri Coordinates defining the features. SLIDE_UNIQUE_ID Unique ID assigned to landslide based on U.S. National Grid System Producer-defined An alphanumeric code consisting of grid location in U.S. National Grid System and a unique number SHAPE_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. slide_properties Table of properties for each landslide Authors OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. SLIDE_UNIQUE_ID Unique ID assigned to landslide based on U.S. National Grid System Producer-defined An alphanumeric code consisting of grid location in U.S. National Grid System and a unique number LOCATION_METHOD How the landslide was identified Producer-defined A description of the source or method used to identify and map the landslide AGE_EST_SLIDE Estimated age of landslide Producer-defined A description of the estimated age of a mapped landslide DATE_SLIDE The estimated date that the landslide occurred Producer-defined Estimated date that the landslide occured CLASS_SLIDE The type of landslide Producer-defined Descriptive text for the type of landslide occurrence GEOLOGIC_MATERIAL Type of geologic material involved in landslide Producer-defined Description of geologic material involved in landslide GEOLOGIC_UNIT Geologic unit name for material involved in landslide Generally from the Minnesota Geological Survey The unit name from most relevant geologic map, generally the Minnesota Geological Survey County Map Atlas if available, or another geologic map. DEEP_SHALLOW_SEATED Describes if the landslide is deep or shallow-seated Produce-defined Seated more shallow than 4.5m (15ft) Shallow seated Producer-defined Seated deeper than 4.5m (15ft) deep seated Producer-defined HEADSCARP_HEIGHT_m Height, in meters of the scarp at the head of the landslide Producer-defined 0 500 meters LENGTH_m Length of landslide (along slope) Producer-defined 0 10000 meters WIDTH_m Width of landslide (across slope) Producer-defined 0 10000 meters DEPTH_m depth of landslide Producer-defined 0 100 meters SLOPE magnitude of the slope prior to or adjacent to landslide Producer-defined 0 90 degrees CONFIDENCE_CLASS_SLIDE The level of confidence that the landslide is classified correctly in CLASS_SLIDE Producer-defined Low (=<10) Low confidence Producer-defined Moderate (11-29) Moderate confidence Producer-defined High (=>30) High confidence Producer-defined CONFIDENCE_LOCATION Confidence that the slide is located correctly Producer-defined Low (=<10) Low confidence Producer-defined Moderate (11-29) Moderate confidence Prodicer-defined High (=>30) High confidence Producer-defined DESCRIPTION_COMMENTS Comments Producer-defined Text to provide any additional information. May not be interpretable to end-user ASPECT Direction that the landslide faces Producer-defined Chosen from list of eight compass directions: North, Northeast, East, Southeast, South, Southwest, West, Northwest. These were calculated using ESRI ArcGIS's Aspect tool. MappingAreas The areas that were investigated to create this landslide inventory Authors OBJECTID Internal feature number Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry Esri Coordinates defining the features. Shape_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. GS ScienceBase U.S. Geological Survey mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata, and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. The mapping data and photographs are contained in zip files, the user must have software capable of uncompressing the WinZip files. The ESRI file geodatabases are readable in ESRI software as well as with free software options such as the GDAL tools that are implemented in free GIS applications such as QGIS. https://gdal.org/drivers/vector/openfilegdb.html. Ehi photographs are in .jpg format with their geographical information written to an EXIF header. These are readable in a number of software and can be added to a GIS using several available tools, for example: "Import Geotagged Photos" in QGIS or "GeoTagged Photos To Points" in ESRI ArcGIS. 20211222 Stephen B DeLong SOUTHWEST REGION: EARTHQUAKE SCIENCE CENTER Supervisory Research Geologist mailing and physical

2270 Woodale Drive

Mounds View MN 55112 US 6521-356-4102 sdelong@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998