County Geologic Atlas Program


Todd County Geologic Atlas Part B

GWELPY metadata

Modeled Water Table Elevation


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

GWELPY

 

System Name

 

Abstract

Countywide modeled water-table elevation. This shapefile includes an estimate of the water table elevation in the surficial sand aquifer and in non-aquifer sediments. Because of much better data in the surficial sand aquifer, the model of water-table elevation is more accurate than the estimate in non-aquifer material.

 

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

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 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

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 a hydrologically-corrected Digital Elevation Model (DEM) constructed by DNR Waters for mapping surface watersheds; and the elevation of large and small lakes from the same DEM. To account for water-table elevation changes between the top of drumlins and the intervening swales, it was assumed that the water table on the top of drumlins was ten feet below land surface. Between drumlins, wet soils and shallow lakes indicate that the water table is close to the land surface. Those 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 by sampling the hydrologically-corrected DEM. 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.

 

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)

GWELPY

 

 

 

Elevation
(representing modeled water table elevation in feet above sea level)

 

1150-1175
1175-1200
1200-1225
1225-1250
1250-1275
1275-1300
1300-1325
1325-1350
1350-1375
1375-1400
1400-1425
1425-1450
1450-1475
1475-1500
1500-1525

 

 

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

GWELPY

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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