Metadata: Chisago County Geologic Atlas, Part B

GIS Metadata

County Geologic Atlas Series C-22

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

Chisago County Geologic Atlas, Part B

Abstract

ArcGIS files depicting characteristics of the groundwater system of Chisago County, Minnesota

Purpose

Geographic information systems (GIS) layers cartographically depict spatially analyzed data used in the production of the Chisago 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, and bedrock aquifers; estimation of groundwater residence time; and sensitivity to pollution of the buried aquifers and the near-surface materials.

Time Period of Content Date

Currentness Reference

data was acquired or accessed between 2010 and 2012

Progress

Complete

Maintenance and Update Frequency

None Planned

Spatial Extent of Data

Chisago County, Minnesota

Bounding Coordinates

-97.27
-89.4
49.4
43.4

Place Keywords

Chisago 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

Chisago County Geologic Atlas, Part A, County Geologic Atlas Series C-22, published by the Minnesota Geological Survey (MGS), 2010. 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

Completeness

Complete

Horizontal Positional Accuracy

Vertical Positional Accuracy

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 data base 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 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 shapefiles, grids, or feature classes 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

Horizontal Datum

NAD83

Horizontal Units

meters

Section 5

Attributes

Overview

The Chisago County Geologic Atlas, Part B consists of 7 separate GIS data layers divided into four plates and 1 GIS data layer not shown on published plates:

Plate 7 - Surficial Aquifer Hydrogeology
Plate 8 - Quaternary and Bedrock Aquifer Hydrogeology
Plate 9 - Hydrogeologic Cross Sections
Plate 10 - Pollution Sensitivity

Detailed Citation

Table Detail:

Field Name	Valid Values	Definition
Used in more than one plate
chempt	-	Wells sampled by DNR staff for chemistry
indexpt	-	Well data used by DNR staff to construct aquifer and related maps

Field Name	Valid Values	Definition	Definition Source
Used in Plate 7
gwelpy	-	Modeled water-table elevation

Field Name	Valid Values	Definition
Used in Plate 8
potsfcpy	-	Modeled potentiometric surface elevations of the buried aquifers
potsfcln	-	Potentiometric surface contours of the bedrock aquifers

Field Name	Valid Values	Definition
Used in Plate 10
nrsfsnpy	-	Sensitivity to pollution of the near-surface materials
aqbdsnpy	-	Sensitivity to pollution of the buried aquifers and bedrock surface

Field Name	Valid Values	Definition	Definition Source
Not shown on published plates
gwdppy	-	Depth-to-water table


Section 6	Distribution
Publisher	Minnesota Department of Natural Resources, Ecological and Water Resources Division
Publication Date	2014
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 factual 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 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, shapefiles, and feature classes by clicking "I AGREE" below. The geodatabase (Chisago_c22.gdb) is the preferred format. Shapefiles are also included (Chisago_c22_shape) for those who require that data format. The shapefiles were converted from feature classes in a file geodatabase. Because some of the data contain null values, which are not supported by shapefiles, we suggest using the shapefiles with caution. The conversion to shapefiles changes null values to zeros or blanks and makes querying the data more difficult.
Online Linkage	I AGREE to the notice in "Distribution Liability" above. Clicking to agree will download the files. See "Ordering Instructions" above for details.

Section 7	Metadata Reference
Metadata Date	07/23/2015
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	MnGeo guidelines page

This page last updated: 07/23/2015
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