County Geologic Atlas Program


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 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 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 15
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:  
Used in more than one plate
Field Name Valid Values Definition Definition Source
chempt
-
Wells sampled by DNR staff for chemistry  
indexpt
-
Well data used by DNR staff to construct aquifer and related maps  
Used in Plate 7
Field Name Valid Values Definition Definition Source
gwelpy
-
Modeled water-table elevation  

 

 

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

 

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

 

Not shown on published plates
Field Name Valid Values Definition Definition Source
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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