County Geologic Atlas Program


Todd County Geologic Atlas Part B

SDTHPY metadata

Modeled Surficial Sand Aquifer Thickness


Minnesota DNR Waters
County Geologic Atlas and Regional Hydrogeologic Assessment Program

Description of data created for Todd County Geologic Atlas, Part B
County Geologic Atlas Series C-18

Metadata created using Minnesota Geographic Metadata Guidelines version 1.2
Metadata content prepared 2011-01-03


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 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

 

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.The preceeding link is to a non-DNR site

 

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

 

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

 

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 aquifer thickness in feet)

 

0-25
25-50
50-75
75-100
Greater than 100

 

 

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

 

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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