Pine County Geologic Atlas Part B

Minnesota DNR Waters
County Geologic Atlas and Regional Hydrogeologic Assessment Program

Description of data created for
Pine County Geologic Atlas, Part B, CGA-13

GWSLPY - Sensitivity to Pollution of the Uppermost Bedrock Aquifers

Metadata created using Minnesota Geographic Metadata Guidelines version 1.2
Metadata content prepared 2004-06-28


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

GWSLPY

 

System Name

 

Abstract

Sensitivity to Pollution of the Uppermost Bedrock Aquifers

Purpose

County Geologic Atlas and Regional Hydrogeologic Assessment Program,
Pine County Atlas, Part B, CGA-13

Time Period of Content Date

Publication date

Currentness Reference

This file was interpreted from all the data collected and used for this investigation.  The interpretations used the best information and critiques available up to the time of publication.

Progress

Complete

Maintenance and Update Frequency

None Planned

Spatial Extent of Data

Pine County, Minnesota.

Bounding Coordinates

East

-92.2

West

-93.2

North

46.5

South

45.7

Place Keywords

Minnesota, Pine County

Theme Keywords

Pollution sensitivity

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

MGS ftp site.The preceeding link is to a non-DNR site , Generalized sensitivity areas.

 

Section 2

Data Quality Information - - - - - - top

Attribute Accuracy

 

Logical Consistency

Data are topologically correct using ArcView 3.3

Completeness

Complete using the information available.  The sensitivity to pollution of many areas within the county is shown as unknown on the map due to limited information such as unknown surficial sand thickness.

Horizontal Positional Accuracy

unknown

Vertical Positional Accuracy

not applicable

Lineage

The GIS components of the Sensitivity Map are examined separately in Figures 3a, 3b, and 3c of Plate 10. The basic map file was created by reclassifying the surficial geology map (SGNT - MGS Part A) into 8 relative permeability classifications as shown on Plate 10.  Each classification was given a new code in the attribute table.  The glacial sediment thickness or drift thickness map (DTNT - MGS Part A) was combined with selected polygons (areas where depth to bedrock is less than 25 feet) from the Bedrock Endowment map (RSNTBG - MGS Part A).  The combination process was an ArcView 3.3 union operation.  The attribute table for this combined thickness file was given a new field with simple codes for each thickness range.  The reclassified surficial geology map and the modified glacial sediment thickness map were combined in a union operation using ArcMap 8.3.  The fields indicating the attributes from the component maps were concatenated into a single field using ArcView 3.3.

Local factors annotations were added to the appropriate records/polygons by visual comparison with the individual local factors shapefiles and editing of the GWSLPY attribute table.  The unsaturated Hinckley Sandstone polygons (UTLGFPY) were created by Jim Berg with water level data and geologic stratigraphy data from the County Well Index (CWI).  A new polygon file was created in ArcView 3.3 on-screen by forming polygons around the CWI point data with interpolations that accounted for river valleys and other topographic features.  The file used to add buried sand and gravel annotations was created by selecting the appropriate polygons from DTNT.  The final sensitivity codes in GWSLPY were symbolized with a legend file (GWSLPY.avl) that reclassified and grouped the various codes according to the sensitivity matrix. 

Sensitivity interpretation was based on overlapping estimated time of travel ranges as follows:

Red - - Very High - - Hours to months
Orange - - High - - Weeks to years
Yellow - - Moderate - - Years to decades
Light green - - Low - - Decades to a century
Dark green - - Very Low - - A century or more

Source Scale Denominator

100,000

 

Section 3

Spatial Data Organization Information - - - - - - top

Native Data Set Environment

ArcView 3.3

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)

gwslpy.dbf

 

 

 

RATING

Sensitivity ratings: "VL" is very low; "L" is low; "M" is moderate; "H" is high; "VH" is very high; and "none" indicates no sensitivity rating.

 

Section 6

Distribution Information - - - - - - top

Publisher

Minnesota DNR Waters

Publication Date

2004

Contact Person Information

See Metadata Reference Information section, below

Distributor's Data Set Identifier

gwslpy

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:
Pine County Geologic Atlas, Part B: Metadata for GIS and Digital Data

Online Linkage

Pine County Geologic Atlas, Part B: Metadata for GIS and Digital Data

 

Section 7

Metadata Reference Information - - - - - - top

Metadata Date

2004-06-28

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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