Ramsey County Geologic Atlas

This page last updated: 04/06/2007
Metadata created using Minnesota Geographic Metadata Guidelines


Metadata Summary

Originator Minnesota Geological Survey
Abstract A County Geologic Atlas is a systematic study of a county's geologic and ground water resources. Geologic studies include both near-surface deposits and bedrock. Ground water studies include flow systems, aquifer capacity, and ground water chemistry. In some areas sand and gravel deposits, sinkholes, or other features are studied. Interpretation of sensitivity to pollution is also part of an atlas. The information is organized, analyzed, and displayed using geographic information technology.
Browse Graphic View a sample of the data.
Time Period of Content Date 1992
Currentness Reference Geologic linework delineated based on data available in 1991-1992.
Access Constraints None
Use Constraints Credit given to the Minnesota Geological Survey and Ramsey County for use of data in map products.
Distributor Organization Minnesota Geological Survey
Ordering Instructions Data is available for free online download from Minnesota Geological Survey ftp site. See online linkage field. All arc export files and access files are at this location. File, index.txt, gives a file listing.
Online Linkage Click here to download data. (See Ordering Instructions above for details.) By clicking here, you agree to the notice in "Distribution Liability" in Section 6 of this metadata.

Full Metadata

Ramsey County Geologic Atlas

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 of page
Originator Minnesota Geological Survey
Title Ramsey County Geologic Atlas
Abstract A County Geologic Atlas is a systematic study of a county's geologic and ground water resources. Geologic studies include both near-surface deposits and bedrock. Ground water studies include flow systems, aquifer capacity, and ground water chemistry. In some areas sand and gravel deposits, sinkholes, or other features are studied. Interpretation of sensitivity to pollution is also part of an atlas. The information is organized, analyzed, and displayed using geographic information technology.
Purpose County Geologic Atlas and Regional Hydrogeologic Assessment information is used in planning and environmental protection efforts at all levels of government. Wellhead protection and well-sealing programs are examples of local programs that need geologic and ground water information. The information is also used by businesses and the general public.
Time Period of Content Date 1992
Currentness Reference Geologic linework delineated based on data available in 1991-1992.
Progress Complete
Maintenance and Update Frequency None planned
Spatial Extent of Data Ramsey County, Minnesota
Bounding Coordinates -93.23
-92.98
45.13
44.88
Place Keywords Ramsey County, Minnesota, Twin Cities Metropolitan Area
Theme Keywords geoscientificInformation, Bedrock Geology, Surficial Geology, Quaternary Geology, Bedrock Topography, Water Table Contours, Ground Water Levels, Wells, Pollution Sensitivity
Theme Keyword Thesaurus ISO 19115 Topic Category
Access Constraints None
Use Constraints Credit given to the Minnesota Geological Survey and Ramsey County for use of data in map products.
Contact Person Information Joyce Meints,
Minnesota Geological Survey
2642 University Avenue
St. Paul, Minnesota 55114
Phone: 612-627-4780 Ext. 214
FAX:
E-mail: meint002@maroon.tc.umn.edu
Browse Graphic View a sample of the data.
Browse Graphic File Description
Associated Data Sets C-7. Geologic atlas of Ramsey County, Minnesota. G.N. Meyer and L. Swanson, eds. 1992. 10 pls. Scale 1:48,000 and smaller. $12.50. Folded copies only. Some digital files available, no metadata. Paper map and report available from the MGS Map Sales Office (2642 University Avenue, St. Paul, Minnesota, 55114, 612-627-4782)

Some of the Ramsey County bedrock geology information has been updated, revised and combined with data from the other six metro counties to form several seamless metro geology data sets for the Twin Cities Metropolitan Ground Water Model at the Minnesota Pollution Control Agency (1996-2000). Information about data available online and on CD is available at the Metro Model website:
http://www.pca.state.mn.us/water/groundwater/metromodel.html

Metadata for this project is at http://www.lmic.state.mn.us/chouse/metadata/gwmodel.html

For a listing of other geologic maps go to the Minnesota Geological Survey website at http://www.geo.umn.edu/mgs/

For a listing of the status of the DNR Ground Water Mapping Program, go to:
http://www.dnr.state.mn.us/waters/groundwater_section/mapping/index.html

 
Section 2 Data Quality Information Top of full metadata Top of page
Attribute Accuracy
Logical Consistency
Completeness
Horizontal Positional Accuracy
Lineage Investigations begin with a review of existing information, such as earlier geologic maps, soil maps, and hydrologic reports. Drillers send water well logs to the Minnesota Geological Survey, where they are reviewed, interpreted, and entered into the County Well Index (CWI), an interactive data base of water-well information. Building on the previous data, field studies are conducted to improve the understanding of local geologic and hydrologic conditions. Linework is created based upon the field studies and base data, and digitized. Background GIS data layers such as roads, surface hydrography, township grids, etc., are obtained from various sources, as noted in the Entity/Attribute section.
Source Scale Denominator 48000
 
Section 3 Spatial Data Organization Information Top of full metadata Top of page
Native Data Set Environment Arc/INFO Unix environment
Geographic Reference for Tabular Data
Spatial Object Type Vector
Vendor Specific Object Types Point, Vector, Polygon
Tiling Scheme Ramsey County
 
Section 4 Spatial Reference Information Top of full metadata Top of page
Horizontal Coordinate Scheme UTM
Ellipsoid Clarke 1866
Horizontal Datum NAD27
Horizontal Units Meters
Distance Resolution
UTM Zone Number 15E
Coordinate Offsets or Adjustments Y-shift 0f -4,700,000 meters
 
Section 5 Entity and Attribute Information Top of full metadata Top of page
Entity and Attribute Overview Index of coverages for Ramsey County Geological Atlas 1992

These covers were digitized as a pilot project to accompany the Ramsey County Geological Atlas paper maps. The covers do not have metadata because they were completed before it became a requirement for digital data.

** Ramsey county coverages

bgpg = polygon cover of bedrock geology, scale 1:48,000
sgpg = polygon cover of surficial geology (1:48,000)

btln = line cover of bedrock topography
wtln = line cover of water table contours

pspgwt = polygon cover of pollution sensitivity of water table
pspgopcj = polygon cover of pollution sensitivity of
Prairie du Chien-Jordan aquifer

wwpt = point cover of water well locations
wwptcwi = point cover of water wells with cwi attributes

** Base layers **

county = county boundary [DOT?]
c62cnty = poly cover of county border (digitized from 1:24,000?)
c62sect = poly cover of sections (digitized from 1:24,000?)
pls = poly/line cover of public land survey [DNR]
hydro = rivers/lake boundaries [TIGER]
rdln = major roads (modified from TIGER)
Entity and Attribute Detailed Citation Metadata for individual layers is not available. Contact MGS with questions.
 
Section 6 Distribution Information Top of full metadata Top of page
Publisher Minnesota Geological Survey
Publication Date 1992
Contact Person Information Joyce Meints

Minnesota Geological Survey
2642 University Avenue
St. Paul, Minnesota 55114
Phone: 612-627-4780 Ext. 214
FAX:
E-mail: meint002@maroon.tc.umn.edu
Distributor's Data Set Identifier c07rams
Distribution Liability
Transfer Format Name Coverages are in Arc/Info Export. County Well Index is in Microsoft Access format.
Transfer Format Version Number
Transfer Size 28 MB, (total of all files, arc/INFO export, uncompressed.)
Ordering Instructions Data is available for free online download from Minnesota Geological Survey ftp site. See online linkage field. All arc export files and access files are at this location. File, index.txt, gives a file listing.
Online Linkage Click here to download data. (See Ordering Instructions above for details.) By clicking here, you agree to the notice in "Distribution Liability" above.
 
Section 7 Metadata Reference Information Top of full metadata Top of page
Metadata Date 04/06/2007
Contact Person Information Susanne Maeder, GIS Data Coordinator
Minnesota Land Management Information Center (LMIC)
300 Centennial Building; 658 Cedar Street
St. Paul, Minnesota 55155
Phone: 651.201.2488
FAX: 651.296.3698
E-mail: clearing.house@state.mn.us
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


This page last updated: 04/06/2007