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Geodatabase of the datasets used to represent the two subunits of the Pennsylvanian aquifer in the Lower Peninsula of Michigan
Summary
- Type of release
- ongoing release of a series of related datasets
- Data Licence
- Not Applicable
- Content Licence
- Creative Commons CCZero
- Verification
- automatically awarded
- Release Date
- 19 August 2015
- Modified Date
- 19 August 2015
- Update Frequency
- notPlanned
- Publishers
- U.S. Geological Survey, Department of the Interior
- Identifier
- geodatabase-of-the-datasets-used-to-represent-the-two-subunits-of-the-pennsylvanian-aquifer-in-
- Landing Page
- http://catalog.data.gov/dataset/geodatabase-of-the-datasets-used-to-represent-the-two-subunits-of-the-pennsylvanian-aquifer-in-
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Description
This geodatabase includes spatial datasets that represent the Pennsylvanian aquifers in the Lower Peninsula of Michigan. Included are: (1) polygon extents; datasets that represent the entire aquifer extent in the States of Alabama, Georgia, Illinois, Indiana, Kentucky, Maryland, Michigan, Ohio, Pennsylvania, Tennessee, Virginia, and West Virginia; the entire extent subdivided into subareas or subunits where data exist (Lower Peninsula of Michigan only), (2) raster datasets for the altitude of each aquifer subarea or subunit, (3) points of altitude used to generate the surface rasters The extent of the Pennsylvanian aquifer is derived from the linework of the Pennsylvanian aquifers extent maps in U.S. Geological Survey Scientific Investigations Report 2009-5060 (USGS SIR 2009-5060), and a digital version of the aquifer extent presented in the Groundwater Atlas of the United States (the U.S. Geological Survey Hydrologic Atlas 730-J. The area with top and bottom aquifer surface data, the Lower Peninsula of Michigan, subarea 2 (SA2) of the Pennsylvanian aquifer has 2 aquifer subunits, the (A1) Upper and (A2) Lower Pennsylvania aquifers. The altitude values for each subunit available were digitized from georeferenced datasets of altitude points used in the modeling effort described in USGS SIR 2009-5060, and the resultant top and bottom altitude values were interpolated into surface rasters within a GIS using tools that create hydrologically correct surfaces from point altitude data. The primary tool was a version of "Topo to Raster" used in ArcGIS, ArcMap, Esri 2014. The raster surfaces were corrected for the areas where the altitude of an underlying layer of the aquifer exceeded altitude of an overlying layer bu setting the underlying surface raster to the altitude values of the overlying surface raster.
General Information
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This data is described at
http://catalog.data.gov/dataset/geodatabase-of-the-datasets-used-to-represent-the-two-subunits-of-the-pennsylvanian-aquifer-in- Do you think this data is incorrect? Let us know
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This data is published by
U.S. Geological Survey, Department of the Interior Do you think this data is incorrect? Let us know
Legal Information
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The rights statement is at
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Outside the US, this data is available under
Creative Commons CCZero Do you think this data is incorrect? Let us know
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There are
yes, and the rights are all held by the same person or organisation Do you think this data is incorrect? Let us know
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The content is available under
Creative Commons CCZero Do you think this data is incorrect? Let us know
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This data contains
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Practical Information
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The data appears in this collection
http://catalog.data.gov/organization/usgs-gov Do you think this data is incorrect? Let us know
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This data changes
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The data is
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Technical Information
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Releases of this data are listed at
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Find out how to contact someone about this data at
http://catalog.data.gov/dataset/geodatabase-of-the-datasets-used-to-represent-the-two-subunits-of-the-pennsylvanian-aquifer-in- Do you think this data is incorrect? Let us know
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http://www.data.gov/issue/?media_url=http://catalog.data.gov/dataset/geodatabase-of-the-datasets-used-to-represent-the-two-subunits-of-the-pennsylvanian-aquifer-in- Do you think this data is incorrect? Let us know