D-03 Depth to Bedrock 2025 (gdb)
ISO-19139 Metadata
Metadata Information
Metadata language: eng
Metadata character set: utf8
Last update: 2026-04-06
Metadata contact:
Role: pointOfContact
Individual's name: Richard Lively
Organization's name: Minnesota Geological Survey
Contact's position: GIS Supervisor
Contact information:
Phone:
Voice: 612-626-2969
Address:
Delivery point: 2609 Territorial Rd.
City: St. Paul
Administrative area: MN
Postal code: 55112
Country: US
e-mail address: lively@umn.edu
Hours of service: 8 am - 4:30 pm
Scope of the data described by the metadata: dataset
Scope name: dataset
Name of the metadata standard used: ISO 19139 Geographic Information - Metadata - Implementation Specification
Version of the metadata standard: 2007
Metadata identifier: 7aeca3d4320a4a4d8111f746796c947f
Data Identification Information
Resource citation:
Title: D-03 Depth to Bedrock 2025 (gdb)
Date:
Reference date - publication: 2020-08-15T13:26:00
Date:
Reference date - revision: 2026-01-08
Presentation format: mapDigital
Series:
Name: D-03; MGS d-series database
Issue: First published in 2020
Other citation details: This raster is the uppermost of four surfaces representing depth to bedrock in Minnesota. 1. depth to bedrock; 2. depth to pre Mesozoic bedrock surface; 3. depth to Precambrian bedrock surface; 4. depth to basement. Suggested citation: Minnesota Geological Survey, 2020, Depth to bedrock in Minnesota: Minnesota Geological Survey Digital Data D-03, https://umn.maps.arcgis.com/apps/StorytellingSwipe/index.html?appid=c36a3951cc174e6f9bdee7514b11b7e7# This work was completed with support of the U.S. Geological Survey (USGS) National Geological and Geophysical Data Preservation Program (NGGDPP) under award G19AS00009 and the U.S. Geological Survey (USGS) under GLC Grant Agreement No. G19AC00320.
Cited responsible party:
Role: originator
Organization's name: Minnesota Geological Survey, University of Minnesota
Themes or categories of the resource: elevation, environment, geoscientificInformation
Descriptive keywords:
Place keywords:
Keywords: Lake Superior, Minnesota
Descriptive keywords:
Theme keywords:
Keywords: geoscientificInformation, environment, elevation
Keyword thesaurus:
Title: ISO 19115 Topic Categories
Date:
Descriptive keywords:
Theme keywords:
Keywords: surface, bedrock, thickness, land surface, depth, sediment, Quaternary
Descriptive keywords:
Keyword type not provided
Keywords: Downloadable Data
Keyword thesaurus:
Citation reference: 723f6998-058e-11dc-8314-0800200c9a66
Abstract: Depth to bedrock. A raster showing the depth to the bedrock surface (thickness of Quaternary glacial sediments from the land surface, in feet, across the state of Minnesota and includes that part of Minnesota that lies in the western part of the Lake Superior basin. The bedrock surface is an erosional surface comprised of Cretaceous (Mesozoic) rocks and sediments, Paleozoic rocks, and Precambrian rocks. Certain Tribal Nations have elected not to be included in this state wide dataset and the Minnesota Geological Survey is respecting those wishes. Counties updated in the 2025 version are Dakota, Lincoln, Pipestone, Lac Qui Parle and Yellow Medicine.
Purpose: This geodatabase raster shows the thickness of the Quaternary glacial sediments overlying the bedrock surface (Depth to Bedrock) across the state of Minnesota. This is important geologic information in identifying potential sources of groundwater and pollution sensitivity. The bedrock surface is an erosional surface comprised of Cretaceous (Mesozoic) rocks and sediments, Paleozoic rocks, and Precambrian rocks.
Dataset language:eng
Dataset character set: utf8
Status: underDevelopment
Resource maintenance:
Update frequency: asNeeded
Resource constraints:
General constraints:
Limitations of use: Every reasonable effort has been made to ensure the accuracy of the factual data on which this map interpretation is based; however, the Minnesota Geological Survey does not warrant or guarantee that there are no errors. Users may wish to verify critical information; sources include both the references listed here and information on file at the offices of the Minnesota Geological Survey in St. Paul, MN. In addition, effort has been made to ensure that the interpretation conforms to sound geologic and cartographic principles. No claim is made that the interpretation shown is rigorously correct, however, and it should not be used to guide engineering-scale decisions without site-specific verification. Please reference the Minnesota Geological Survey the authroitave data source.
Spatial representation type: grid
Processing environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595
Resource extent:
Geographic element:
Bounding rectangle:
Extent contains the resource: true
West longitude: -99.744727
East longitude: -87.277532
North latitude: 49.859955
South latitude: 42.976342
Resource extent:
Extent description: Raster datasets extend from the start of digital mapping of bedrock surfaces in 2007 until the present (2020) and is expected to be ongoing. Data is derived from water well data in Minnesota that can extend from the present to the mid 1800's.
Temporal element:
Temporal extent:
Beginning date: 2020-08-15T13:34:00
Ending date: 2026-01-08T00:00:00
Object GML ID: N65732
Resource extent:
Geographic element:
Bounding rectangle:
Extent contains the resource: true
West longitude: -99.744727
East longitude: -87.277532
North latitude: 49.859955
South latitude: 42.976342
Supplemental information: Contour lines for the bedrock topography were based on point data (water wells) with a horizontal accuracy of 15 meters. Lines must be less accurate than the points that they are based on. Horizontal accuracy of the printed 1:100,000 scale maps is about 100 meters. Distance resolution for the statewide rasters is 90 meters, the raster cell size. This has been improved over the 2016 version which had a cell size of 150m. Vertical accuracy is between 25 to 50 feet, the interval of the bedrock contour lines. The elevation of the bedrock surface used in the Lake Superior portion of Minnesota is derived from Wold, R. J., Hutchinson, D. R., and Johnson, T. C., 1982, Topography and surficial structure of the Lake Superior bedrock as based on seismic reflection profiles, in Wold, R. J., and Hinze, W. J., Geology and tectonics of the Lake Superior basin: Geological Society of America Memoir 156, p.257-272
Credits: Minnesota Geological Survey
Resource point of contact:
Role: pointOfContact
Individual's name: Richard Lively
Organization's name: Minnesota Geological Survey
Contact's position: GIS Supervisor
Contact information:
Phone:
Voice: 612-626-2969
Address:
Delivery point: 2609 Territorial Rd.
City: St. Paul
Administrative area: MN
Postal code: 55112
Country: US
e-mail address: lively@umn.edu
Hours of service: 8 am - 4:30 pm
Resource point of contact:
Role: pointOfContact
Individual's name: Julia Steenberg
Organization's name: Minnesota Geological Survey
Contact's position: Geologist
Contact information:
Phone:
Voice: 612-626-2969
Address:
Delivery point: 2609 Territorial Rd
City: St. Paul
Administrative area: MN
Postal code: 55114
Country: US
e-mail address: jsteenb@umn.edu
Hours of service: 8 am - 4:30 pm
Resource point of contact:
Role: pointOfContact
Individual's name: Richard Lively
Organization's name: Minnesota Geological Survey
Contact's position: GIS Supervisor
Contact information:
Phone:
Voice: 612-626-2969
Address:
Delivery point: 2609 Territorial Rd.
City: St. Paul
Administrative area: MN
Postal code: 55112
Country: US
e-mail address: lively@umn.edu
Hours of service: 8 am - 4:30 pm
Resource point of contact:
Role: pointOfContact
Individual's name: Richard Lively
Organization's name: Minnesota Geological Survey
Contact's position: GIS Supervisor
Contact information:
Phone:
Voice: 612-626-2969
Address:
Delivery point: 2609 Territorial Rd.
City: St. Paul
Administrative area: MN
Postal code: 55112
Country: US
e-mail address: lively@umn.edu
Hours of service: 8 am - 4:30 pm
Resource point of contact:
Role: pointOfContact
Individual's name: Jacqueline Hamilton
Organization's name: Minnesota Geologic Survey
Contact's position: Geologic Information Scientist
Contact information:
Phone:
Voice: 612-626-2969
Address:
Delivery point: 2609 West Territorial Road
City: St. Paul
Administrative area: MN
Postal code: 55114
e-mail address: stub0035@umn.edu
Spatial Representation
Georectified Data
Number of dimensions:
Cell geometry: area
Transformation parameters are available:
Check points are available:
Check point description: LiDAR and contour data creted by geologists
Reference System Information
Reference system identifier:
Value: 26915
Code space: EPSG
Version: 6.11(3.0.1)
Data Quality
Scope of quality information:
Level of the data:dataset
Resource lineage:
Process step:
When the process occurred: 2020-05-01T00:00:00
Description: Created a raster of the bedrock surface in Minnesota from contours and from point data which sampled the land surface where bedrock was exposed. Raster cell size of 90m. Subtracted the bedrock surface from the 30m land surface DEM, resampled to 90m, to create the depth to bedrock in feet. Resampled to 30m to match the cell size of the DEM and updates from CGA's. Units still in feet.
Data quality report:
Completeness omission:
Measure produced by the test: Selected Tribal Nations have asked to be omittd from this dataset.
Data quality result:
Conformance test results:
Test passed:
Meaning of the result:
Test specification:
Title:
Date:
Data quality report:
Absolute external positional accuracy:
Measure produced by the test: Contour lines for the bedrock topography were based on point data (water wells) with a horizontal accuracy of 15 meters. Lines must be less accurate than the points that they are based on. Horizontal accuracy of the printed 1:100,000 scale maps is about 100 meters. Distance resolution for the statewide rasters is 90 meters, the raster cell size. This has been improved over the 2016 version which had a cell size of 150m. Vertical accuracy is between 25 to 50 feet, the interval of the bedrock contour lines. The elevation of the bedrock surface used in the Lake Superior portion of Minnesota is derived from Wold, R. J., Hutchinson, D. R., and Johnson, T. C., 1982, Topography and surficial structure of the Lake Superior bedrock as based on seismic reflection profiles, in Wold, R. J., and Hinze, W. J., Geology and tectonics of the Lake Superior basin: Geological Society of America Memoir 156, p.257-272. 90 meter accuracy resampled to 30 meter.
Data quality result:
Data quality report:
Quantitative attribute accuracy:
Measure produced by the test: Contour lines for the bedrock topography were based on point data (water wells) with a horizontal accuracy of 15 meters. Lines must be less accurate than the points that they are based on. Horizontal accuracy of the printed 1:100,000 scale maps is about 100 meters. Distance resolution for the statewide rasters is 90 meters, the raster cell size. This has been improved over the 2016 version which had a cell size of 150m. Vertical accuracy is between 25 to 50 feet, the interval of the bedrock contour lines. The elevation of the bedrock surface used in the Lake Superior portion of Minnesota is derived from Wold, R. J., Hutchinson, D. R., and Johnson, T. C., 1982, Topography and surficial structure of the Lake Superior bedrock as based on seismic reflection profiles, in Wold, R. J., and Hinze, W. J., Geology and tectonics of the Lake Superior basin: Geological Society of America Memoir 156, p.257-272
Data quality result:
Distribution Information
Distributor:
Distributor contact:
Role: pointOfContact
Individual's name: Jacqueline Hamilton
Organization's name: Minnesota Geological Survey
Contact's position: Geologic Information Scientist
Distribution format:
Format name: File Geodatabase Raster Dataset
Format version: File Geodatabase Raster Data
Transfer options:
Online distribution information:
Name of resource: Authoritative data files
Online location: https://umn.maps.arcgis.com/home/item.html?id=35c19137ba784a839edbf0686a7ef558