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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 aquifer thickness in Todd County, Minnesota |
Purpose | County Geologic Atlas and Regional Hydrogeologic Assessment Program,
Todd County Geologic Atlas, Part B, County Geologic Atlas Series C-18 |
Time Period of Content Date | November, 2010 |
Currentness Reference | Publication date |
Progress | Complete |
Maintenance and Update Frequency | None Planned |
Spatial Extent of Data | Todd County, Minnesota |
Bounding Coordinates | East | -94.6 | West | -95.2 | North | 46.4 | South | 45.8 |
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Place Keywords | Minnesota, Todd 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 | Todd County Geologic Atlas, Part A, County Geologic Atlas Series C-18, published by the Minnesota Geological Survey, 2007. More information and downloadable data for Part A 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 9.3 |
Completeness | Complete |
Horizontal Positional Accuracy | unknown |
Vertical Positional Accuracy | not applicable |
Lineage | [Surface Sand Thickness] was calculated with the following expression: [USGS TOPO SURFACE DEM] - [Bottom Elevation of Surficial Sand] The [Bottom Elevation of Surficial Sand] was calculated from the interpreted base of sand on the 33 east-west cross sections and bottom of surficial sand interpreted from all verified location CWI well logs that penetrated the surficial sand. The [Bottom Elevation of Surficial Sand] was calculated by interpolation with the spline method. Next, where the bottom of surficial sand interpolation was calculated to be below the top of X2 aquifer grid, the bottom of surficial sand grid was changed to be equal to the top of the X2 aquifer grid. Last, the spline interpolation can create unacceptable bulls-eye artifacts, either too high or too low. Because of this, areas where the interpolation suggested a depth to bottom of the surficial aquifer that was too deep were corrected to a reasonable depth. Near Long Prairie, in the middle of the largest outwash channel, a maximum depth of 120 feet was considered reasonable. Elsewhere, a maximum depth of 100 feet was more appropriate. Because of this, near the City of Long Prairie, areas where the interpolation suggested a depth to bottom of the surficial aquifer greater than 120 feet were set equal to 120 feet. Away from the city, depths greater than 100 feet were set equal to 100 feet. |
Source Scale Denominator | 100000 |
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Section 3 | Spatial Data Organization Information - - - - - - top |
Native Data Set Environment | ArcGIS 9.3 |
Geographic Reference for Tabular Data | Not Applicable |
Spatial Object Type | Vector |
Vendor Specific Object Types | polygon |
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) | SDTHPY | | | | Thick
(representing modeled surficial sand aquifer thickness in feet) | 0-25
25-50
50-75
75-100
Greater than 100 |
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Section 6 | Distribution Information - - - - - - top |
Publisher | Minnesota DNR Waters |
Publication Date | 2010 |
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 ArcGIS shapefiles from:
Todd County Geologic Atlas, Part B: Metadata for GIS and Digital Data |
Online Linkage | Todd County Geologic Atlas, Part B: Metadata for GIS and Digital Data |
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Section 7 | Metadata Reference Information - - - - - - top |
Metadata Date | 2011-01-03 |
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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