Rice County Geologic Atlas, Part B

Minnesota Geographic Metadata Guidelines
Metadata Entry Template

Version 1.0.4 - July 1, 1997

A State Version of the FGDC Content Standards for Geospatial Metadata

***
Description of data that was created for
The Rice County Geologic Atlas
by
DNR Waters
County Geologic Atlas and Regional Hydrogeologic Assessment Program


Data Set Name: GWSL2PY

Metadata Entered By: Randy McGregor

Date: 6/9/98


Section 1 Identification Information
Originator Moira Campion
Title GWSL2PY
Minnesota Clearinghouse ID  
Abstract Sensitivity of the water table to pollution
Purpose County Geologic Atlas Program: Atlas C-9 Part B, Plate 9 Pollution Sensitivity
Time Period of Content Date 1993 - 1997
Currentness Reference  
Progress Complete
Maintenance and Update Frequency None Planned
Spatial Extent of Data Rice County, Minnesota
West Bounding Coordinate 458,001  
East Bounding Coordinate 496,882  
North Bounding Coordinate 4,932,388  
South Bounding Coordinate 4,893,695  
Place Keywords Rice County, Minnesota
Theme Keywords Pollution Sensitivity, Water Table, Aquifers
Theme Keyword Thesaurus  
Access Constraints None
Use Constraints None
Contact Person Moira Campion
Contact Organization Minnesota Department of Natural Resources, Division of Waters
Contact Person Position Hydrogeologist
Contact Address 500 Lafayette Road
Contact City St. Paul
Contact State or Province Minnesota
Contact Postal Code 55155 - 4032
Contact Voice Phone (651) 259-5661
Contact Fax Phone (651) 296-0445
Contact E-mail Address moira.campion@state.mn.us
Browse Graphic File Name  
Browse Graphic File Description  
Associated Data Sets Atlas C-9 Part A, produced by the Minnesota Geological Survey

Section 2 Data Quality Information
Attribute Accuracy  
Logical Consistency Data are topologically correct using ARC/INFO 7.1.1.
Completeness Complete
Horizontal Positional Accuracy N.A.
Vertical Positional Accuracy N.A.
Lineage NOTE: This is a very complex coverage. A thorough explanation of its compilation is provided at the end of this document.

In short, sensitivity ratings are derived as follows:

Very High

  • ?Less than 50 ft to bedrock
  • ?Subset of MGS' surficial geology coverage where mgscode = 443002,443006,443102,443521,443527,443528 (alluvium or outwash designations) 
  • ?Subset of MGS' surficial geology coverage where mgscode = 443001 (organic deposits) and located close to or within alluvial/outwash deposits 
  • ?Selected wetlands from the National Wetlands Inventory of type 3 (shallow marsh), 4 (deep marsh), and 5 (lakes). West of the Cannon River, only wetlands over 3000 sq. meters are included; east of the river, only wetlands over 1,500 sq. meters are included
  • ?50 meter buffer around lakes.
  • ?50 meter buffer around eskers.
High
  • ?Interior (southeast-ward) 1/3 mile buffer of Decorah/Platteville/Glenwood boundary where there is less than 50 ft. of cover
  • ?Subset of MGS' surficial geology coverage where mgscode = 443001 (organic deposits) outside of alluvial/outwash deposits and where depth-to-bedrock is greater than 50 ft.
Moderate - Non-organic, non-alluvial/outwash deposit areas where depth-to-bedrock is greater than 50'.

Low - Subset of MGS surficial geology coverage where mgscode = 443505, glacial lake sediment over till.

Source Scale Denominator 100,000

Section 3 Spatial Data Organization Information
Native Data Set Environment ARC/INFO
Geographic Reference for Tabular Data UTM Coordinates
Spatial Object Type Vector
Vendor Specific Object Types Polygons
Tiling Scheme Rice County

Section 4 Spatial Reference Information
Horizontal Coordinate Scheme UTM
Ellipsoid GRS 1980
Horizontal Datum NAD83
Horizontal Units N.A.
Altitude Datum N.A.
Altitude Units N.A.
Depth Datum N.A.
Depth Units N.A.
Cell Width N.A.
Cell Height N.A.
If UTM  
UTM Zone Number 15
Coordinate Offsets or Adjustments None
Distance Resolution  

Section 5 Entity and Attribute Information
Entity and Attribute Overview  
Entity and Attribute Detailed Citation  
Table Name Field Name Begin Column Definition Valid Values Description 
gwsl2py.pat         Polygon Attribute Table
  sensitivity 25 10,10,c   Pollution sensitivity rating based on estimated vertical travel time for water-borne surface contaminants to reach the aquifer.
        'Very High' Hours to months
        'High' Weeks to years
        'Moderate' Years to decades
        'Low' More than a century

Section 6 Distribution Information
Publisher Minnesota Department of Natural Resources, Division of Waters
Publication Date 1997
Online Linkage  
Distributor Contact Person  
Distributor Organization Minnesota Department of Natural Resources, Division of Waters
Distributor Position  
Distributor Address 500 Lafayette Rd.
Distributor City St. Paul
Distributor State or Province MN
Distributor Postal Code 55155 - 4032
Distributor Voice Phone (651) 296 - 4800
Distributor Fax Phone (651) 296 - 0445
Distributor
E-mail Address
 
Distributor's Data Set Identifier   
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 ARC/INFO, ArcExport, INFO
Transfer Format Version Number 7.1.1
Transfer Size  
Ordering Instructions Downloadable data are accessible through Rice County Geologic Atlas, Part B: Metadata for GIS and Digital Data

Section 7 Metadata Reference Information
Metadata Date December 19987
Metadata Contact Person  GIS Specialist
Metadata Contact Organization Minnesota Department of Natural Resources, Division of Waters
Metadata Contact Position  GIS Specialist
Metadata Contact Address 500 Lafayette Road
Metadata Contact City St. Paul
Metadata Contact State or Province MN
Metadata Contact Postal Code 55155 - 4032
Metadata Contact Voice Phone (651) 259 - 5693 or (651) 259 - 5700
Metadata Contact Fax Phone (651) 296 - 0445
Metadata Contact
E-mail Address
 
Metadata Standard Name Minnesota geographic Metadata Guidelines
Metadata Standard Version 1.0.4
Metadata Standard Online Linkage  

Addendum:

Full explanation of the compilation of 'gwsl2py.'

First, a  proto sensitivity coverage was created by a stepwise UNION of ten different coverages in ARC/INFO. An order of priority was determined by Moira Campion based on which coverages would be drawn one on top of the other to visually depict water-table pollution sensitivity. Because the UNION command in ARC/INFO merges attributes in the order they are added, with matching items dropped from the incoming coverage, each incoming coverage was given a unique item(s) that would identify its components even after all ten had been unioned together.

CODE1 = 'y'

Polygons from the MGS depth-to-bedrock coverage where depth-to-bedrock is less than 50 ft. These polygons were selected using the selection criterion, 'CINTER' = '<50'. These polygons are rated 'CODE1' = 'y'. Any polygons internal to polygons with 'CODE1' = 'y' were coded as 'CODE1_INT' = 'y'. Thus, polygons with 'CODE1_INT' = 'y' represent areas where depth-to-bedrock is greater than 50 feet.

CODE2 = 'y'

Represents an interior 1/3 mile buffer along the edge of the Decorah-Platteville-Glenwood confining unit. There were no internal polygons

for areas with 'CODE2' = 'y'.

CODE3 = 'y'

Polygons from MGS' depth-to-bedrock coverage with depth-to-bedrock values greater than 50. This set of polygons is the compliment of 'CODE1' polygons. Thus, the entire county was subdivided into regions with depth-to-bedrock less than 50 feet and areas where depth-to- bedrock is greater than 50 feet. 'CODE3_INT', represent areas where depth to bedrock is less than 50 feet.

CODE4 = 'y'

Polygons from MGS' surficial geology coverage meeting one of the following criteria:

  • 'MGSCODE' = 443002, 443006, 443102, 443521, 443527, 443528 (alluvium or outwash designations)
  • 'MGSCODE'= 443001 (organic deposits) and within or near alluvial/outwash deposits.

These polygons were rated 'CODE4' = 'y,'and the internal polygons were designated 'CODE4_INT' = 'y'.

CODE5 = 'y'

Derived from a small coverage used only to counteract discrepancies between various data sources while keeping all sources unchanged. Polygons with 'CODE5' = 'y' have no scientific value and serve only a small cartographic purpose.

CODE6 = 'y'

Polygons from MGS' surficial geology coverage where 'MGSCODE' = 443001 (organic deposits) and not within or near alluvial/outwash deposits. Any internal polygons from this set were given 'CODE6_INT' = 'y'.

CODE7 = 'y'

Selected NWI Wetlands. Only wetlands of type 3 (shallow marsh), 4 (deep marsh) and 5 (lakes) were used. West of the Cannon River, wetlands over 3000 square meters are included; East of the river, wetlands over 1500 square meters are included. Internal polygons (islands within wetland areas) were designated 'CODE7_INT' = 'y'.

CODE8 = 'y'

Derived from a single polygon selected from the MGS' surficial geology coverage having 'MGSCODE' = 443505. This single polygon represents an area of glacial lake sediments. Any polygon having 'CODE8' = 'y' was derived from this single polygon.

CODE9 = 'y'

A 50 meter buffer zone around all but the smallest lakes from the USGS Digital Line Graph (DLG) hydrology layer. The size of the lakes that were excluded from the buffer operation was not documented.

CODE10 = 'y'

Derived from buffered areas around the arcs from the MGS' surficial geology line coverage where 'MGSCODE' = 449011 (eskers) and a portion of one arc with 'MGSCODE' = 449007 (fluvial channel bank, obscure). These arcs were buffered with a 50 meter tolerance and round end-points. In coverage units, this buffering distance roughly approximates the areal extent of these eskers, and was performed to 'polygonize' the line features.

Sensitivity ratings were calculated as follows:
 

'Very High' 'High' 'Moderate' 'Low'
  • code1 = 'y'(except where code2 also = 'y')
i.e., less than 50 ft. to aquifer
  • code4 = 'y'
i.e., Alluvium / outwash or organic deposits near alluvium / outwash features
  • code7 = 'y'
i.e., Selected Wetlands
  • code9 = 'y'
i.e., 50 meter buffer around selected lakes
  • code10 = 'y'
i.e., Eskers
  • code1 and code2 = 'y'
i.e., Edge of the Decorah-Platteville-Glenwood confining unit with less than 50 ft. of cover
  • code3 and code6 = 'y'
i.e., Organic deposits outside of alluvial/outwash zones and where depth-to-bedrock is greater than 50 ft.

NOTE: All of the criteria for 'Very High,' except code1 = 'y,' override all other criteria.

code3 = 'y' and code6 ne 'y'

i.e., Non-organic, non-alluvial, and non-outwash sediments where depth-to-bedrock is greater than 50 ft.

NOTE: All of the criteria for 'Very High,' except code1 = 'y,' override all other criteria.

code8 = 'y'

i.e., glacial lake sediments

NOTE: All of the criteria for 'Very High,' except code1 = 'y,' override all other criteria

Finally, this proto sensitivity coverage was dissolved on the item 'Sensitivity' resulting in 'gwsl2py.'