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Section 1 | Identification Information - - - - - - top |
Originator | Minnesota DNR Waters - County Geologic Atlas and Regional Hydrogeologic Assessment Program |
Title | AQTHCNLN |
System Name | |
Abstract | Modeled aquifer thickness contours of the buried aquifers in the Traverse-Grant, Minnesota RHA study area |
Purpose | County Geologic Atlas and Regional Hydrogeologic Assessment Program,
Traverse-Grant Regional Hydrogeological Assessment, Part B, Regional Hydrogeological Assessment Series RHA-6 |
Time Period of Content Date | November, 2008 |
Currentness Reference | Publication date |
Progress | Complete |
Maintenance and Update Frequency | None Planned |
Spatial Extent of Data | West-central Minnesota, including: all of Pope County, all of Stevens County, northern Big Stone County, southern Douglas County, southern Grant County, and most of Traverse County. |
Bounding Coordinates | East | -95.1 | West | -96.7 | North | 46.0 | South | 45.4 |
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Place Keywords | Pope, Stevens, Big Stone, Douglas, Grant, and Traverse counties; Minnesota. |
Theme Keywords | buried aquifer thickness 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 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 | See Metadata Reference Information section, below |
Browse Graphic File Name | |
Browse Graphic File Description | |
Associated Data Sets | Traverse-Grant Regional Hydrogeologic Assessment, Part A, Regional Hydrogeologic Assessment Series RHA-6 published by the Minnesota Geological Survey, 2006. More information and downloadable data for Part A is available on the MGS ftp site. |
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Section 2 | Data Quality Information - - - - - - top |
Attribute Accuracy | |
Logical Consistency | Data are topologically correct using ArcGIS 9.2 |
Completeness | Complete |
Horizontal Positional Accuracy | unknown |
Vertical Positional Accuracy | not applicable |
Lineage | The primary data used to construct the thickness DEM grid file was derived from located and unlocated well logs in the county well index (CWI) database managed by the Minnesota Department of Health and the Minnesota Geological Survey which was supplemented by test boring logs from the US Geological Survey and surface resistivity data that were collected by DNR Waters personnel during the summers of 2004 through 2006. These data were combined into two data files with location, elevation, and depth and lithology information. Using a custom ArcGIS 9 extension (DNR Waters Stick Diagrams) 66 west-east geologic cross sections were created, interpreted, and the stratigraphic contacts were digitized as line files in ArcGIS 9.X by Jim Berg. Using another custom DNR extension (DNR Waters get XYZ points) the vertices of the shapefile lines were converted to point shapefiles that also have elevation above MSL as an attribute. To create this file the points that defined the base of each aquifer were selected to create part of the dataset that was interpolated using a spline tension method with default parameters in Arc GIS 9.X into a grid file that represents the bottom each aquifer. A second point file was created to represent the elevation of the aquifer top. These points were also interpolated using a spline tension method with default parameters in ArcGIS 9.X. Each aquifer bottom DEM was subtracted from its respective aquifer top DEM to produce a thickness grid file. The final raster was converted to a polyline shapefile using a contour surface analysis in ArcGIS 9.X Spatial Analyst. |
Source Scale Denominator | 100000 |
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Section 3 | Spatial Data Organization Information - - - - - - top |
Native Data Set Environment | ArcGIS 9.2 |
Geographic Reference for Tabular Data | Not Applicable |
Spatial Object Type | Vector |
Vendor Specific Object Types | line |
Tiling Scheme | state |
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Section 4 | Spatial Reference Information - - - - - - top |
Horizontal Coordinate Scheme | UTM |
Ellipsoid | GRS1980 |
Horizontal Datum | NAD83 |
Horizontal Units | meters |
Distance Resolution | meters |
Altitude Datum | n/a |
Altitude Units | n/a |
Depth Datum | n/a |
Depth Units | n/a |
Cell Width | 0 |
Cell Height | 0 |
Latitude Resolution | 0 |
Longitude Resolution | 0 |
UTM Zone Number | 15 |
SPCS Zone Identifier | 0 |
County Coordinate Zone Identifier | 0 |
Coordinate Offsets or Adjustments | n/a |
Map Projection Name | n/a |
Map Projection Parameters | n/a |
Other Coordinate System's Definition | n/a |
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Section 5 | Entity and Attribute Information - - - - - - top |
Entity and Attribute Overview | |
Entity and Attribute Detailed Citation HTML Table (Not Available) | aqthcnln | | | | CONTOUR | Modeled aquifer thickness in feet. Contour interval is 20 feet. | | AQUIFER_Q | Buried aquifer code. The aquifers are identified as either "LG", "OT", "CW", "aquifer 1", or "western aquifer". |
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Section 6 | Distribution Information - - - - - - top |
Publisher | Minnesota DNR Waters |
Publication Date | 2008 |
Contact Person Information | See Metadata Reference Information section, below |
Distributor's Data Set Identifier | aqthcnln |
Distribution Liability | This map was prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the factual data on which this map is 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. |
Transfer Format Name | shapefile |
Transfer Format Version Number | |
Transfer Size | |
Ordering Instructions | Download ARCVIEW shapefiles from:
Traverse-Grant Regional Hydrogeological Assessment, Part B: Metadata for GIS and Digital Data |
Online Linkage | Traverse-Grant Regional Hydrogeological Assessment, Part B: Metadata for GIS and Digital Data |
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Section 7 | Metadata Reference Information - - - - - - top |
Metadata Date | 2009-03-16 |
Contact Person Information | GIS Specialist, Atlas/Assessment Program
Minnesota DNR - Division of Waters
500 Lafayette Road
Saint Paul, MN 55155
Phone: (651) 259-5693
FAX: (651) 296-0445
E-mail: |
Metadata Standard Name | Minnesota Geographic Metadata Guidelines |
Metadata Standard Version | 1.2 |
Metadata Standard Online Linkage | http://www.lmic.state.mn.us/gc/stds/metadata.htm |
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