Minnesota DNR Waters County Geologic Atlas and Regional Hydrogeologic Assessment Program Description of data created for Crow Wing County Geologic Atlas, Part B County Geologic Atlas Series C-16 SDTHPY – Modeled Surficial Sand and Gravel Thickness Metadata created using Minnesota Geographic Metadata Guidelines version 1.2 Metadata content prepared 2009-01-29
Go to Section: 1. Identification Information 2. Data Quality Information 3. Spatial Data Organization Information 4. Spatial Reference Information 5. Entity and Attribute Information 6. Distribution Information 7. Metadata Reference Information
Section 1 | Identification Information - - - - - - top
Originator | Minnesota DNR Waters - County Geologic Atlas and Regional Hydrogeologic Assessment Program
Title | SDTHPY
System Name |
Abstract | Modeled surficial sand and gravel thickness in Crow Wing County, Minnesota
Purpose | County Geologic Atlas and Regional Hydrogeologic Assessment Program, Crow Wing County Geologic Atlas, Part B, County Geologic Atlas Series C-16
Time Period of Content Date | June, 2007
Currentness Reference | Publication date
Progress | Complete
Maintenance and Update Frequency | None Planned
Spatial Extent of Data | Crow Wing County, Minnesota
Bounding Coordinates |
East | -93.8
West | -94.4
North | 46.8
South | 46.2
Place Keywords | Minnesota, Crow Wing County
Theme Keywords | Surficial sand and gravel thickness
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 | Crow Wing County Geologic Atlas, Part A, County Geologic Atlas Series C-16, published by the Minnesota Geological Survey, 2004. More information and downloadable data for Part A available on the MGS ftp site.
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 this file was derived from well logs in the County Well Index (CWI) database managed by the Minnesota Department of Health and the Minnesota Geological Survey (MGS) with verified locations. Using a custom ArcGIS 9 extension (DNR Waters Stick Diagrams) 75 west-east geologic cross sections were created, interpreted, and the stratigraphic contacts were digitized as line files in ArcView 3.3. Using another custom DNR extension (DNR Waters get XYZ points) the vertices of the shapefile lines are converted to point shapefiles that also have elevation above MSL as an attribute. To create this file the points that defined the base of the surficial sand layer were selected to create part of the dataset that was interpolated into a grid file that represents the bottom of the surficial sand. A second point file was created to represent the land surface elevation around the edge of the surficial sand. This file was created by selecting the surficial sand polygons from the MGS surfacial geology file, dissolving the boundaries between the polygons, and creating a file with points at 100 meter intervals along the boundaries of the surface sand with ArcGIS 9.2. Surface elevation values from a land surface DEM were added to the point records as an elevation field using ArcGIS. These two point shape files were merged. Then a third data set of assumed or estimated surficial sand bottom elevations was created for certain areas where very little well data were available and incorporated into the merged shape file. The resulting point file was interpolated using a spline tension method with default parameters in Arc GIS 9.2. The resulting grid elevation file was subtracted from the land surface DEM to produce a thickness grid file of the surficial sand. The final raster was converted to a polygon shapefile.
Source Scale Denominator | 100000
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 | polygon
Tiling Scheme | state
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
Section 5 | Entity and Attribute Information - - - - - - top
Entity and Attribute Overview |
Entity and Attribute Detailed Citation HTML Table (Not Available) |
sdthpy |  |
| Thick (representing modeled surficial sand and gravel thickness in feet) | 0-20 20-40 40-60 60-80 80-100 100-120 Greater than 120 feet
Section 6 | Distribution Information - - - - - - top
Publisher | Minnesota DNR Waters
Publication Date | 2007
Contact Person Information | See Metadata Reference Information section, below
Distributor's Data Set Identifier | sdthpy
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: Crow Wing County Geologic Atlas, Part B: Metadata for GIS and Digital Data
Online Linkage | Crow Wing County Geologic Atlas, Part B: Metadata for GIS and Digital Data
Section 7 | Metadata Reference Information - - - - - - top
Metadata Date | 2009-01-29
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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