# POTSFCLN

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: POTSFCLN
Abstract: Modeled potentiometric contour elevations of the buried sand and gravel aquifers and uppermost bedrock aquifers in Blue Earth County, Minnesota.
Purpose: Blue Earth County Geologic Atlas, Part B, County Geologic Atlas Series C-26
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, potentiometric surface contours
Theme Keyword Thesaurus: None
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 hydrogeologic 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, 2012. More information and downloadable data for Part A is available on the MGS data site: http://www.mngs.umn.edu/county_atlas/countyatlas.htm

## Section 2: Data Quality

Attribute Accuracy: 1:100,000
Logical Consistency: Data are topologically correct using ArcGIS 10.2.2
Completeness: Complete
Horizontal Positional Accuracy: NA
Vertical Positional Accuracy: NA
Lineage: Data source for all maps:
These files were made with water level information from two general sources: driller's logs from the County Well Index (CWI) database managed by the Minnesota Department of Health and the Minnesota Geological Survey with verified locations and measurements by DNR staff in conjunction with well sampling for this atlas project. The driller's log data represent a data set that was collected over a period of several decades and spans seasonal and multi-year climatic trends of wet and dry conditions. Where the dataset included both CWI driller's log information and water levels collected by DNR staff, the DNR data were used.
Bedrock groundwater flow direction lineage:
The potentiometric surface contours were developed using static water level data from the County Well Index (CWI) and DNR project data as described above for wells constructed with open hole sections with the upper 100 feet beneath the top of the bedrock surface. Several wells with anomalous elevation values were removed. The elevation values were interpolated using the Topo to Raster tool with no drainage enforcement. Contours were generated using the Spatial Analyst contour tool. Contours were then modified by hand by adding and removing vertices.
Potentiometric surfaces of the buried sand and gravel aquifers lineage:
Static water elevation data from CWI and DNR project data as described above for each particular aquifer were posted on individual maps with elevation data from major rivers as a reference. These data were hand contoured at 20-foot intervals. The contours were interpolated with the Topo to Raster tool (no drainage enforcement) to produce an elevation raster per aquifer unit. The Analysis Mask was set to the extent of the buried aquifer.

## 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:
Detailed Citation:
Table Detail:

POTSFCLN - Buried sand and gravel aquifer and uppermost bedrock groundwater flow directions
Field Name | Valid Values | Definition | Definition Source
--- | --- | --- | ---
AQUIFER | - | "sm", "st", "s2", and "se" are buried sand and gravel aquifers. "upper" is upper geologic unit (St. Peter Sandstone, Prairie du Chien Group, and Jordan Sandstone); "Ce", "Csl" are fractured aquitards (St. Lawrence Formation and Eau Claire Formation); "lower" is lower geologic unit (Tunnel City Group, Wonewoc Sandstone, Eau Claire Formation, and Mt. Simon Sandstone) |
CONTOUR | - | Modeled potentiometric surface contours of the buried sand and gravel aquifers and uppermost bedrock aquifer in 40-foot intervals from 780 to 1020 feet above mean sea level. |

## 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: POTSFCLN
Distribution Liability: These data were prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the factual data on which these 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 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.
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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