{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Jennifer S. Stanton", "hasEmail": "mailto:jstanton@usgs.gov"}, "description": "This geodatabase contains spatial datasets that represent the Coastal Lowlands \naquifer system in the States of Alabama, Florida, Louisiana, and Texas. Included are: \n(1) polygon extents; datasets that represent the aquifer system extent, the entire extent \nsubdivided into subareas or subunits, and any polygon extents of special interest \n(outcrop areas, no data available, areas underlying other aquifers, anomalies, for example), \n(2) altitude, and/or if applicable, thickness contours used to generate the surface rasters, \n(3) raster datasets for the altitude of each aquifer subarea or subunit, \n(4) georeferenced images of the figures that were digitized to create the altitude or thickness \ncontours. \nThe images and digitized contours are supplied for reference.\n\t\t\t\nThe extent of the Coastal Lowlands aquifer system is from the combined digitized linework \nof the Coastal Lowlands aquifer system extent maps in U.S. Geological Survey Professional \nPaper 1416-C (USGS PP 1416 C), plates 9, 10, 11, 14, and 16, figures A. Included is the \n\"no data available\" extent of Subarea 2 (see description below).\n\t\t\t\nThe Coastal Lowlands aquifer system has 5 aquifer subunits, A = shallowest, B, C, D, E = deepest. \nThere are two subareas. Subarea 1 is the area described in USGS PP 1416-C. Subarea 2 is the \npart of the aquifer in Alabama and Florida, east of the USGS PP 1416-C extent; there are no data \nfor this subarea. \n\t\t\t\nThe altitudes of the top surfaces of the subunits were digitized from georeferenced images of \naltitude contours; the altitudes of the bottom surfaces of the subunits were generated from \nthe thickness contours of each subunit.\n\tSubunit A1 (Holocene - upper Pleistocene deposits, Permeable Zone A)\n\tSubunit A2 (lower Pleistocene - upper Pliocene deposits, Permeable Zone B)\n\tSubunit A3 (lower Pleistocene - upper Miocene deposits, Permeable Zone C)\n\tSubunit A4 (middle Miocene deposits, Permeable Zone D)\n\tSubunit A5 (lower Miocene - upper Oligocene deposits, Permeable Zone E)\n\t\t\t\t\nDigitizing of the extent and thickness/altitude linework was done by the USGS \nOklahoma Water-Science Center.\n\t\t\t\t\nSubunit thickness datasets, and altitude datasets were interpolated into surface \nrasters within a GIS using tools that create hydrologically correct surfaces from \ncontour data, derives the altitude from the thickness (depth from the overlying surface), \nand merges the subareas into a single surface. The primary tool was \"Topo to Raster\" \nused in ArcGIS, ArcMap, Esri 2014", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9RRPFAC", "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.0a826d65-fb83-4da0-86cb-91002d0b1ddf.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_0a826d65-fb83-4da0-86cb-91002d0b1ddf", "keyword": ["Alabama", "Coastal Lowlands", "Florida", "Holocene -upper Pleistocene deposits", "Louisiana", "Mississippi", "Texas", "USGS:0a826d65-fb83-4da0-86cb-91002d0b1ddf", "United States", "aquifer", "aquifer system", "coastal lowlands", "extent", "groundwater", "inlandWaters", "lower Miocene-upper Oligocene deposits", "lower Pleistocene-upper Miocene deposits", "lower Pleistocene-upper Pliocene depoists", "lower Pleistocene-upper Pliocene deposits", "middle Miocene deposits"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-99.25749546, 25.441122308, -85.772884232, 32.697811706", "theme": ["geospatial"], "title": "Geodatabase of the datasets that represent the five vertical subunits of the Coastal Lowlands aquifer system, Alabama, Florida, Louisiana, Mississippi, and Texas"}