{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Jennifer S. Stanton", "hasEmail": "mailto:jstanton@usgs.gov"}, "description": "This geodatabase includes spatial datasets that represent the Texas Coastal Uplands and \nMississippi Embayment aquifer system in the States of Alabama, Arkansas, Illinois, Kentucky, \nLouisiana, Mississippi, Missouri, Tennessee, and Texas. Included are: (1) polygon extents; \ndatasets that represent the aquifer system extent, the entire extent subdivided into subareas \nor subunits, and any polygon extents of special interest (outcrop areas, no data available, \nareas underlying other aquifers, anomalies, for example), (2) raster datasets for the altitude \nof each aquifer subarea or subunit, (3) altitude, and/or if applicable, thickness contours used \nto generate the surface rasters, (4) georeferenced images of the figures that were digitized \nto create the altitude and thickness contours. The images and digitized contours are supplied \nfor reference.\n\t\t\t\nThe extent of the Texas Coastal Uplands and Mississippi Embayment aquifer system is derived \nfrom the linework in the aquifer system extent maps in U.S. Geological Survey Professional Paper \n1416-B (USGS PP 1416-B), plates 11, 13, 15, 16, and 17, and from a digital version of the aquifer \nextents presented in the U.S. Geological Survey Hydrologic Atlas 730, Chapters E and F. \n\t\t\t\nThe Texas Coastal Uplands and Mississippi Embayment aquifer system has 6 aquifer subunits, \nin order from the most surficial to the deepest: A1: Upper Claiborne aquifer, A2: Middle Claiborne \naquifer, A3: Lower Claiborne- Upper Wilcox aquifer, A4: Middle Wilcox aquifer, A5: Lower Wilcox \naquifer, A6: McNairy-Nacatoch aquifer. \n\t\t\t\nThe altitude and thickness contours for each available subunit were digitized from georeferenced \nfigures of altitude contours in USGS PP 1416-B, and the resultant top and bottom altitude values \nwere interpolated into surface rasters within a GIS using tools that create hydrologically correct \nsurfaces from contour data, derives the altitude from the thickness (depth from the land surface), \nand merges the subareas into a single surface. The primary tool was an enhanced version of \n\"Topo to Raster\" used in ArcGIS, ArcMap, Esri 2014. The raster surfaces were corrected for \nthe areas where the altitude of an underlying layer of the aquifer exceeded altitude of an overlying \nlayer.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9WZO452", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.9e057599-c9dc-49bf-82dd-1935ca8ddf1c.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_9e057599-c9dc-49bf-82dd-1935ca8ddf1c", "keyword": ["Alabama", "Arkansas", "Illinois", "Kentucky", "Louisiana", "Lower Wilcox aquifer", "McNairy-Nacatoch aquifer", "Middle Claiborne aquifer", "Middle Wilcox aquifer", "Mississippi", "Mississippi Embayment aquifer", "Missouri", "Mower Claiborne-Upper Wilcox aquifer", "Tennessee", "Texas", "Texas Coastal Uplands aquifer", "USGS:9e057599-c9dc-49bf-82dd-1935ca8ddf1c", "United States", "Upper Claiborme aquifer", "aquifer", "aquifer system", "environment", "extent", "geoscientificInformation", "groundwater", "inlandWaters"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-100.733858101, 25.995354484, -86.382683389, 37.561160937", "theme": ["geospatial"], "title": "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"}