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Depth to Bedrock, Wisconsin 2008

Identification Information

Citation
Title
Depth to Bedrock, Wisconsin 2008
Originator
Wisconsin Department of Natural Resources
Publication Date
2008-06-05
Geospatial Data Presentation Form
mapDigital
Collection Title
Statewide
Abstract
This layer consists of a 1:250,000-scale polygon coverage containing depth-to-bedrock estimates and related information used in preparing the GCSM for Wisconsin. The primary source for this data layer is a 1973 map at 1:1,000,000 scale published by the WGNHS and USGS. Where more recent information was available, the USGS updated the 50-foot and 100-foot contours of the depth-to-bedrock map at a scale of 1:250,000. Soil associations data, and other information, were used to add a 5-foot contour to the data layer.
Purpose
Depth to bedrock is defined as the distance from the land surface to the top of the bedrock (uppermost consolidated deposit). Where the depth to bedrock is shallow, contaminants generally have less contact time with the earth's natural pollutant removal processes found in unconsolidated surficial deposits. Depth to bedrock was used in the GCSM as an indicator of how thick and thus how important the surficial deposits are in pollutant removal. Depth to bedrock was also used to evaluate the importance of bedrock type in determining an area's susceptibility to groundwater contamination. The greater the depth to bedrock, the more likely that the water table is located above the bedrock layer, rendering the bedrock type insignificant for the GCSM. When the bedrock is shallow (i.e., less than 50 feet from the land surface), bedrock type can affect the ease with which infiltrating waters flow to the groundwater. The GCSM rating scheme uses values for each individual resource characteristic attribute (type of bedrock, surficial deposits, etc.) together with a set of multipliers to determine a composite score. Because of the importance of depth to bedrock in determining the strength of other GCSM factors, the multiplier assigned to each resource characteristic resides in the Bedrock Depth layer.
Temporal Extent
Currentness Reference
Publication Date
Time Instant
2008-06-05T00:00:00
Bounding Box
West
-92.962606
East
-86.710938
North
47.061612
South
42.458044
ISO Topic Category
geoscientificInformation
Place Keyword
Wisconsin
Place Keyword Thesaurus
GNIS
Theme Keyword
Polygon
Theme Keyword Thesaurus
FGDC
Theme Keyword
Shields (Geology)
Theme Keyword Thesaurus
LCSH
Theme Keyword
Bedrock
Theme Keyword Thesaurus
Resource Constraints
Use Limitation
ftp://dnrftp01.wi.gov/geodata/dnrlegal.txt
Legal Constraints
Use Limitation
Although this data is being distributed by the University of Wisconsin-Madison, no warranty expressed or implied is made by the University as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University in the use of this data, or related materials.
Status
completed
Maintenance and Update Frequency
asNeeded
Language
eng
Credit
Wisconsin Department of Natural Resources
Point of Contact
Contact
Wisconsin Department of Natural Resources
Delivery Point
101 S. Webster St.
City
Madison
Administrative Area
WI
Postal Code
53707
Country
US
Email
DNRGEOData@wisconsin.gov
Phone
(608) 264-8914

Spatial Reference Information

Reference System Identifier
Code
3071
Code Space
EPSG
Version

Data Quality Information

Lineage
Process Step
Description
Changed file name from brdppoly to WI_BedrockDepth_2008
Process Date
2016-01-28T00:00:00

Distribution Information

Format Name
Shapefile
Format Version
1.0
Distributor
University of Wisconsin-Madison
Distributor
Wisconsin Department of Natural Resources
Online Access
https://gisdata.wisc.edu/public/WI_BedrockDepth_2008.zip
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
GeoData@Wisconsin
Function
download

Spatial Representation Information

Vector
Topology Level
geometryOnly
Vector Object Type
composite
Vector Object Count
1534

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
46819EBB-3031-4ED4-B474-C56E022D8131
Metadata Date Stamp
2018-05-15
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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