| Section 1 | Overview | |||
| Originator | Minnesota Department of Natural Resources | |||
| Title | AQBDSNPY | |||
| Abstract | Buried aquifer and bedrock surface pollution sensitivity in Chisago County, Minnesota | |||
| Purpose | Chisago County Geologic Atlas, Part B, County Geologic Atlas Series C-22 | |||
| Time Period of Content Date | ||||
| Currentness Reference | data was acquired or accessed between 2010 and 2012 | |||
| Progress | Complete | |||
| Maintenance and Update Frequency | None Planned | |||
| Spatial Extent of Data | Chisago County, Minnesota | |||
| Bounding Coordinates | -97.27 -89.4 49.4 43.4 | |||
| Place Keywords | Chisago County, Minnesota | |||
| Theme Keywords | pollution sensitivity, buried aquifer, bedrock surface | |||
| 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 Minnesota 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 | Holly Johnson,
GIS Specialist Minnesota Department of Natural Resources 500 Lafayette Rd St. Paul, MN 55155-4025 Phone: 651-259-5693 Email: holly.je.johnson@state.mn.us | |||
| Browse Graphic | None available | |||
| Associated Data Sets | Chisago County Geologic Atlas, Part A, County Geologic Atlas Series C-22, published by the Minnesota Geological Survey, 2010. More information and downloadable data for Part A is available on the MGS data site: http://www.mngs.umn.edu/county_atlas/countyatlas.htm | |||
| Section 2 | Data Quality | |||
| Attribute Accuracy | ||||
| Logical Consistency | Data are topologically correct using ArcGIS 10.2 | |||
| Completeness | Complete | |||
| Horizontal Positional Accuracy | NA | |||
| Vertical Positional Accuracy | NA | |||
| Lineage | Sensitivity calculations were made for the top of each buried sand and gravel aquifer by comparing it to the deepest recharge surface. The elevation of the top of the buried sand and gravel aquifers are from the top of the buried sand and gravel units published with the elevation data in Part A. The top of the bedrock is from the bedrock topography data from Part A that was provided by the MGS.
Recharge surfaces were calculated using a vertical recharge model from the land surface down to each mapped buried sand and gravel aquifer, starting with the stratigraphically shallowest sand and gravel aquifer and ending with the stratigraphically deepest sand and gravel aquifer and the top of the bedrock surface. In Chisago County there are seven units to consider in the sensitivity calculations, six buried sand and gravel aquifers and the top of the bedrock surface. The pollution sensitivity maps are primarily based on the depth to the top of the mapped aquifers. Plate 5, Part A includes maps of the depth to the top of the buried sand and gravel aquifers. Plate 6, Part A includes a map of the depth to the bedrock surface. The fine-grained sediment between aquifers is assumed to act as an aquitard that restricts the vertical movement of groundwater between aquifers. Plate 10 has a complete description of the development of the sensitivity model and a description of the sensitivity matrix. Raster calculator was used to create the recharge surfaces. Rasters were reclassified and converted to polygons. | |||
| Section 3 | Spatial Data Organization (not used in this metadata) | |||
| Section 4 | Coordinate System | |||
| Horizontal Coordinate Scheme | Universal Transverse Mercator | |||
| UTM Zone Number | 15 | |||
| Horizontal Datum | NAD83 | |||
| Horizontal Units | meters | |||
| Section 5 | Attributes | |||
| Overview | ||||
| Detailed Citation | ||||
| Table Detail: | ||||
| AQBDSNPY | |||
| Field Name | Valid Values | Definition | Definition Source |
|---|---|---|---|
| AQUIFER_Q | Buried aquifer or bedrock aquifer code. The aquifers are identified as either "bdrk", "sl", "sc", "se", "sx", "sr", or "sp". | ||
| RATING | "VH" is very high "H" is high "M" is moderate "L" is low "VL" is very low | ||
| Section 6 | Distribution | |||
| Publisher | Minnesota Department of Natural Resources, Ecological and Water Resources Division | |||
| Publication Date | 2014 | |||
| Contact Person Information | Holly Johnson,
GIS Specialist Minnesota Department of Natural Resources 500 Lafayette Rd St. Paul, MN 55155-4025 Phone: 651-259-5693 Email: holly.je.johnson@state.mn.us | |||
| Distributor's Data Set Identifier | AQBDSNPY | |||
| Distribution Liability | These data were prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the factual data on which these files are 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. | |||
| Ordering Instructions | Download zip file of metadata, shapefiles, and feature classes by clicking "I AGREE" below.
The geodatabase (Chisago_c22.gdb) is the preferred format. Shapefiles are also included (Chisago_c22_shape) for those who require that data format. The shapefiles were converted from feature classes in a file geodatabase. Because some of the data contain null values, which are not supported by shapefiles, we suggest using the shapefiles with caution. The conversion to shapefiles changes null values to zeros or blanks and makes querying the data more difficult. PDFs of the Chisago County Geologic Atlas plates can be downloaded at: http://www.dnr.state.mn.us/waters/programs/gw_section/mapping/platesum/chiscga.html | |||
| Online Linkage | I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details. | |||
| Section 7 | Metadata Reference | |||
| Metadata Date | 07/24/2015 | |||
| Contact Person Information | Holly Johnson,
GIS Specialist Minnesota Department of Natural Resources 500 Lafayette Rd St. Paul, MN 55155-4025 Phone: 651-259-5693 Email: holly.je.johnson@state.mn.us | |||
| Metadata Standard Name | Minnesota Geographic Metadata Guidelines | |||
| Metadata Standard Version | 1.2 | |||
| Metadata Standard Online Linkage | http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm | |||