GWELPY

This page last updated: 07/24/2015
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 GWELPY
Abstract Modeled water-table elevation in surficial aquifers in Chisago County, Minnesota.
Purpose Chisago County Geologic Atlas, Part B, County Geologic Atlas Series C-22
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 water-table elevation
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 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, 2010. 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
Logical Consistency Data are topologically correct using ArcGIS 10.2
Completeness Complete
Horizontal Positional Accuracy NA
Vertical Positional Accuracy NA
Lineage The water-table elevation was estimated from several sources of data including water levels in wells constructed in the surficial sand aquifer, the elevation of rivers and perennial streams from LiDAR data generalized to 30-meter grid cells, and the elevation of large and small lakes from the same generalized LiDAR data, groundwater discharge locations such as springs and seeps, seepage soils as identified by the Natural Resources Conservation Service (NRCS), and locations of groundwater dependent plant communities from the Minnesota County Biological Survey. The river and lake data were supplemented with Natural Resources Conservation Service (NRCS) polygon shapefiles of soils and associated tabular data that estimate the depth to water-table for wet soils. A 100-meter grid of points was established over wet soil polygons; estimates of depth to water for each point were sampled from each relevant soil polygon and surface elevations were determined from the generalized LiDAR data. The water-table elevation at each point was calculated by subtracting the depth to water from the surface elevation. All of the above data were converted to sample points and interpolated with the ArcGIS Topo to Raster tool to create the water-table elevation model.

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
Detailed Citation
Table Detail:
GWELPY
Field NameValid ValuesDefinitionDefinition Source
ELEVATION
-
Modeled water-table elevation in feet above sea level: >650 to 675, >675 to 700, >700 to 725, >725 to 750, >750 to 775, >775 to 800, >800 to 825, >825 to 850, >850 to 875, >875 to 900, >900 to 925, >925 to 950, >950 to 975, >975 to 1000, >1000 to 1025, >1025 to 1050, >1050 to 1075


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 GWELPY
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, 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.

PDFs of the Chisago County Geologic Atlas plates can be downloaded at: http://www.dnr.state.mn.us/waters/programs/gw_section/mapping/platesum/chiscga.html
Online Linkage I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details.

Section 7 Metadata Reference
Metadata Date 07/24/2015
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 http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm


This page last updated: 07/24/2015
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