|
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. , 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 |
| |
|
