Geodatabase of the datasets used to represent the six subunits of the Texas Coastal Uplands and Mississippi Embayment aquifer system, Alabama, Arkansas, Illinois, Kentucky, Louisiana, Mississippi, Missouri, Tennessee, and Texas

Metadata Updated: August 19, 2015

This geodatabase includes spatial datasets that represent the Texas Coastal Uplands and Mississippi Embayment aquifer system in the States of Alabama, Arkansas, Illinois, Kentucky, Louisiana, Mississippi, Missouri, Tennessee, and Texas. Included are: (1) polygon extents; datasets that represent the aquifer system extent, the entire extent subdivided into subareas or subunits, and any polygon extents of special interest (outcrop areas, no data available, areas underlying other aquifers, anomalies, for example), (2) raster datasets for the altitude of each aquifer subarea or subunit, (3) altitude, and/or if applicable, thickness contours used to generate the surface rasters, (4) georeferenced images of the figures that were digitized to create the altitude and thickness contours. The images and digitized contours are supplied for reference. The extent of the Texas Coastal Uplands and Mississippi Embayment aquifer system is derived from the linework in the aquifer system extent maps in U.S. Geological Survey Professional Paper 1416-B (USGS PP 1416-B), plates 11, 13, 15, 16, and 17, and from a digital version of the aquifer extents presented in the U.S. Geological Survey Hydrologic Atlas 730, Chapters E and F. The Texas Coastal Uplands and Mississippi Embayment aquifer system has 6 aquifer subunits, in order from the most surficial to the deepest: A1: Upper Claiborne aquifer, A2: Middle Claiborne aquifer, A3: Lower Claiborne- Upper Wilcox aquifer, A4: Middle Wilcox aquifer, A5: Lower Wilcox aquifer, A6: McNairy-Nacatoch aquifer. The altitude and thickness contours for each available subunit were digitized from georeferenced figures of altitude contours in USGS PP 1416-B, and the resultant top and bottom altitude values were interpolated into surface rasters within a GIS using tools that create hydrologically correct surfaces from contour data, derives the altitude from the thickness (depth from the land surface), and merges the subareas into a single surface. The primary tool was an enhanced 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.

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Dates

Metadata Date July 6, 2015
Metadata Created Date August 19, 2015
Metadata Updated Date August 19, 2015
Reference Date(s) January 26, 2015 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from Water NSDI Node Spatial Datasets

Graphic Preview

Illustration of dataset

Additional Metadata

Resource Type Dataset
Metadata Date July 6, 2015
Metadata Created Date August 19, 2015
Metadata Updated Date August 19, 2015
Reference Date(s) January 26, 2015 (publication)
Responsible Party U.S. Geological Survey, Midwest Region (Point of Contact)
Contact Email
Access Constraints Use Constraints: The original data were intended to be used at a regional scale of 1:2,500,000. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations., Access Constraints: None. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data.
Bbox East Long -86.382683389
Bbox North Lat 37.561160937
Bbox South Lat 25.995354484
Bbox West Long -100.733858101
Coupled Resource
Frequency Of Update notPlanned
Graphic Preview Description Illustration of dataset
Graphic Preview File http://water.usgs.gov/GIS/browse/ds19TXCLUP_20MSEMBM_A10.jpg
Graphic Preview Type jpg
Guid
Harvest Object Id 81db5fad-0023-43ee-a6d7-5eda022be999
Harvest Source Id e11eb0c1-b794-4812-9369-1bd7306336cd
Harvest Source Title Water NSDI Node Spatial Datasets
Licence Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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