# Blue Earth County Geologic Atlas, Part B

This page last updated: 05/02/2016
Metadata created using Minnesota Geographic Metadata Guidelines

Go to Section:

1. Overview
2. Data Quality
3. Data Organization
4. Coordinate System
5. Attributes
6. Distribution - Get Data
7. Metadata Reference

## Section 1: Overview

Originator:Minnesota Department of Natural Resources
Title: Blue Earth County Geologic Atlas, Part B
Abstract: ArcGIS files depicting characteristics of the groundwater system of Blue Earth County, Minnesota (C-26)
Purpose: Geographic information systems (GIS) layers cartographically depict spatially analyzed data used in the production of the Blue Earth County Geologic Atlas, Part B.
A County Geologic Atlas (CGA) is a systematic study of a county's geologic and groundwater resources. Geologic studies include both glacial deposits and bedrock units. Groundwater studies include the distribution of surficial and buried sand aquifers; hydrogeology of the surficial, buried sand and gravel, and bedrock aquifers; estimation of groundwater residence time; and sensitivity to pollution of the buried sand and gravel aquifers, uppermost bedrock aquifers, and the near-surface materials.
Time Period of Content Date:
Currentness Reference: data were acquired or accessed between 2011 and 2012
Progress: Complete
Maintenance and Update Frequency: None Planned
Spatial Extent of Data: Blue Earth County, Minnesota
Bounding Coordinates: -94.4
-93.8
44.3
43.8
Place Keywords: Blue Earth County, Minnesota
Theme Keywords: buried sand and gravel aquifer, bedrock aquifer, groundwater, water chemistry, residence time, wells, water table, pollution sensitivity
Theme Keyword Thesaurus: --
Access Constraints: None
Use Constraints: Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Minnesota Geological Survey and the Minnesota Department of Natural Resources. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.
Contact Person Information: Holly Johnson, GIS Specialist
Minnesota Department of Natural Resources
500 Lafayette Rd
St. Paul, MN 55155-4025
Phone: 651-259-5693
Email: holly.je.johnson@state.mn.us
Browse Graphic: None available
Associated Data Sets: Blue Earth County Geologic Atlas, Part A, County Geologic Atlas Series C-26, published by the Minnesota Geological Survey (MGS), 2012. More information and downloadable data for Part A available on the MGS site: http://www.mngs.umn.edu/county_atlas/countyatlas.htm

## Section 2: Data Quality

Attribute Accuracy: --
Logical Consistency: Data are topologically correct using ArcGIS 10.2.2
Completeness: Complete
Horizontal Positional Accuracy: NA
Vertical Positional Accuracy: NA
Lineage: Review of available data:
Investigations begin with a review of existing information, such as earlier geologic maps, soil maps, hydrologic reports, and information provided by well drillers. Minnesota Geological Survey staff review and interpret driller's logs, and enter the data into the County Well Index (CWI), an interactive database of water-well information.
Collection of data from the field:
Field studies are conducted to measure static water level elevations and chemistry of selected wells. These studies, combined with pre-existing data, are used to create models of water-table, buried sand and gravel, and bedrock hydrogeology (elevation, potentiometric surface, flow direction, aquifer parameters, groundwater residence time), and sensitivity of groundwater system to pollution.
Creation of GIS layers:
Using a variety of techniques, data are converted into ArcGIS feature classes, grids, or shapefiles for cartographic display and spatial analysis. Metadata for individual layers contain more detailed lineage information.

## Section 3: Spatial Data Organization (not used in this metadata)

## Section 4: Coordinate System

Horizontal Coordinate Scheme: Universal Transverse Mercator
UTM Zone Number: 15
Horizontal Datum: NAD83
Horizontal Units: meters
Vertical Datum:
Vertical Units:
Depth Datum:
Depth Units:

## Section 5: Attributes

Overview: The Blue Earth County Geologic Atlas, Part B consists of 8 separate GIS data layers that were shown on three plates and a report.
Plate 7 - Uppermost Bedrock Groundwater Flow Directions and Bedrock Geology
Plate 8 - Hydrogeologic Cross Sections A-D
Plate 9 - Hydrogeologic Cross Sections E-H
Detailed Citation:
Table Detail:

Used in report and/or plates
Field Name | Valid Values | Definition | Definition Source
--- | --- | --- | ---
aqbdsnpy | - | Sensitivity to pollution of the buried sand and gravel aquifers and the uppermost bedrock aquifers |
chempt | - | 115 wells and one lake were sampled by DNR staff for chemistry |
gwdppy | - | Modeled depth to water table |
gwelpy | - | Modeled water-table elevation |
indexpt | - | Well data used by DNR staff to construct aquifer and related maps |
nrsfsnpy | - | Sensitivity to pollution of the near-surface materials |
potsfcln | - | Potentiometric surface contours of the buried sand gravel aquifers and the uppermost bedrock aquifer |
potsfcpy | - | Modeled potentiometric surface elevations of the buried aquifers |

## Section 6: Distribution

Publisher: Minnesota Department of Natural Resources, Ecological and Water Resources Division
Publication Date: 05/02/2016
Contact Person Information: Holly Johnson, GIS Specialist
Minnesota Department of Natural Resources
500 Lafayette Rd
St. Paul, MN 55155-4025
Phone: 651-259-5693
Email: holly.je.johnson@state.mn.us
Distributor's Data Set Identifier:
Distribution Liability: These data were prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the data on which the files are based. However, the Department of Natural Resources does not warrant the accuracy, completeness, or any implied uses of these data.
Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Minnesota Geological Survey and the Department of Natural Resources. Every effort has been made to ensure that the interpretation shown conforms to sound hydrogeologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.
Ordering Instructions: Download zip file of metadata and feature classes by clicking "I AGREE" below.
PDFs of the Blue Earth County Geologic Atlas can be downloaded at: http://www.dnr.state.mn.us/waters/programs/gw_section/mapping/platesum/bluecga.html
Online Linkage: None available

## Section 7: Metadata Reference

Metadata Date: 05/02/2016
Contact Person Information: Holly Johnson, GIS Specialist
Minnesota Department of Natural Resources
500 Lafayette Rd
St. Paul, MN 55155-4025
Phone: 651-259-5693
Email: holly.je.johnson@state.mn.us
Metadata Standard Name: Minnesota Geographic Metadata Guidelines
Metadata Standard Version: 1.2
Metadata Standard Online Linkage: http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm

This page last updated: 05/02/2016
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