| Section 1 | Overview | |||
| Originator | Minnesota Geospatial Information Office (MnGeo, formerly Land Management Information Center - LMIC) and Minnesota Geological Survey (MGS) | |||
| Title | Hydrogeologic Map of Minnesota: Bedrock Hydrogeology, from MGS (Map S-2), 1978 (Digital Version) | |||
| Abstract | This layer describes the bedrock hydrogeologic conditions of Minnesota as delineated and classified by the Minnesota Geological Survey. It is a digital version of the Minnesota Geological Survey State Map Series Map S-2 (Hydrogeologic Map of Minnesota: Bedrock Hydrogeology), 1978, by Roman Kanivetsky. (1:500,000). Map data was originally grid-cell-coded by MnGeo into a statewide 40-acre parcel representation in EPPL (Environmental Planners Programming Language); the EPPL file was later converted to Arc/INFO using a state transformation process. | |||
| Purpose | To produce a general descriptive layer of bedrock hydrogeology for the state. | |||
| Time Period of Content Date | 1978 | |||
| Currentness Reference | Map was delineated in 1978 based on the subsurface information available at the time. | |||
| Progress | ||||
| Maintenance and Update Frequency | None Planned | |||
| Spatial Extent of Data | Minnesota, Statewide | |||
| Bounding Coordinates | -97.5 -89.0 49.5 43.0 | |||
| Place Keywords | Minnesota, MN, Statewide | |||
| Theme Keywords | geoscientificInformation, Geology, Bedrock Geology, Subsurface, Hydrogeology, Bedrock Hydrogeology, Ground Water Resources, Hydrology | |||
| Theme Keyword Thesaurus | ISO 19115 Topic Category | |||
| Access Constraints | None | |||
| Use Constraints | Credit to Minnesota Geological Survey for map Hydrogeologic Map of Minnesota: Bedrock Hydrogeology, MGS Map S-2, 1978, by Roman Kanivetsky. Credit to MnGeo for digital file creation.
Redistribution Conditions: In obtaining these data from MnGeo, it is understood that you and/or your organization have the right to use them for any internal purpose. If you modify them, you should document those changes in a metadata record that should accompany all redistributed data. If you transmit or provide these data in any form to another user, the data MUST be accompanied by a copy of this disclaimer and all documentation provided with the original data set including the full metadata record. | |||
| Contact Person Information | Susanne Maeder,
Senior Research Analyst Minnesota Geospatial Information Office (MnGeo) 658 Cedar Street St. Paul, MN 55155 Phone: 651-201-2488 Email: gisinfo.mngeo@state.mn.us | |||
| Browse Graphic | Click to view a data sample | |||
| Associated Data Sets | Map: 'Hydrogeologic Map of Minnesota: Bedrock Hydrogeology', Minnesota Geological Survey Map S-2, 1978, Roman Kanivetsky, is the basis for this data layer. Map is available from the Minnesota Geological Survey Bookstore (612) 627-4782.
Other maps and associated data sets at statewide scale include Bedrock Geology, Quaternary Geology, and Quaternary Hydrogeology. | |||
| Section 2 | Data Quality | |||
| Attribute Accuracy | Attributes have been verified. Fifteen polygons within the state have a bedrock geology code of 0. Of these, 14 occur in the Red River Valley and are single or double grid cells (Originally 40-acre cells in EPPL), which due to the sinuosity of the Red River, were classified as not-in-state after gridding. These were not reclassified when the file was converted to arc/info. A fifteenth unclassified polygon occurs for the same reasons at the tip of the arrowhead. | |||
| Logical Consistency | ||||
| Completeness | State file is complete. | |||
| Horizontal Positional Accuracy | ||||
| Lineage | Grid Cell Coding:
Base map data were encoded using manual map transfer and grid overlay techniques. Coding was done on the 1:500,000 statewide paper map. The dominant hydrogeologic feature was coded for each forty-acre parcel. Conversion to Arc Format (mid-1980's): EPPL Statewide data set was converted into Arc/INFO format using an .svf (single variable file) input. The coverage in Arc/INFO keeps the 'stairstep' nature of the original grid data set. File remained in EPPL coordinates. Conversion to UTM Zone 15 NAD83 (1999): The file was converted from unprojected EPPL grid coordinates to UTM, Zone 15, NAD27, using a statewide map transformation. A TICFILE with 50 points statewide was used to transform the 'flat' 40-acre file into a file with a projection. The file was then converted from NAD27 to NAD83 using the arc 'PROJECT' command. Conversion to Shapefile Format File was converted to ArcGIS shapefile format 12/24/2013. | |||
| Section 3 | Spatial Data Organization (not used in this metadata) | |||
| Section 4 | Coordinate System | |||
| Horizontal Coordinate Scheme | Universal Transverse Mercator | |||
| UTM Zone Number | 15E | |||
| Horizontal Datum | NAD83 | |||
| Horizontal Units | meters | |||
| Section 5 | Attributes | |||
| Overview | ||||
| Detailed Citation | Relevant data fields:
BDRKHYDR_C Bedrock Hydrogeology Code (Integer) BDRKHYDR_K Bedrock Hydrogeology Key (Text 50) Bedrock Hydrogeologic Codes are as follows: 1 Cretaceous Aquifer 3 Red River-Winnipeg Aquifer 8 Keweenawan Volcanic Rocks Aquifer 9 Sioux Quartzite Aquifer 10 Proterozoic Aquifer 11 Biwabik Iron Formation Aquifer 12 Precambrian Igneous and Metamorphic Rocks 32 Mount Simon - Hinckley - Fond du Lac Aquifer 48 Franconia-Ironton-Galesville Aquifer 56 Prairie du Chien - Jordan Aquifer 60 St. Peter Aquifer 62 Cedar Valley - Maquoketa - Duluth - Galena Aquifer | |||
| Table Detail: | ||||
| Section 6 | Distribution | |||
| Publisher | Minnesota Geospatial Information Office (MnGeo) | |||
| Publication Date | 1985 | |||
| Contact Person Information | Susanne Maeder,
Senior Research Analyst Minnesota Geospatial Information Office (MnGeo) 658 Cedar Street St. Paul, MN 55155 Phone: 651-201-2488 Email: gisinfo.mngeo@state.mn.us | |||
| Distributor's Data Set Identifier | bdrkhydr | |||
| Distribution Liability | MnGeo's data disclaimer is online: www.mngeo.state.mn.us/chouse/disclaimer.html | |||
| Ordering Instructions | This data set is distributed on the internet by clicking below after Online Linkage. Doing so will tell your browser to start downloading a 'ZIP' file which will contain the following:
- Arc GIS shapefile. - Legend file (bdrkhydr.leg) for the dataset - Metadata (bdrkhydr.htm and bdrkhydr.xml) files for the dataset - NOTICE.RTF, an important notice about this data set that can be read by most word processing software, and an ascii text version of the same notice (NOTICE.TXT) | |||
| Online Linkage | I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process or link to download information. See "Ordering Instructions" above for details. | |||
| Section 7 | Metadata Reference | |||
| Metadata Date | 04/11/2014 | |||
| Contact Person Information | Nancy Rader,
GIS Data Coordinator Minnesota Geospatial Information Office (MnGeo) 658 Cedar Street St. Paul, MN 55155 Phone: 651-201-2489 Email: gisinfo.mngeo@state.mn.us | |||
| Metadata Standard Name | Minnesota Geographic Metadata Guidelines | |||
| Metadata Standard Version | 1.2 | |||
| Metadata Standard Online Linkage | https://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm | |||
