{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Jason S. Finkelstein", "hasEmail": "mailto:jfinkels@usgs.gov"}, "description": "This polyline shapefile consists of digital contours that represent the potentiometric-surface altitude of water in the Lloyd and contiguous North Shore aquifer beneath Nassau and Suffolk Counties, Long Island, New York. The U.S. Geological Survey constructed a potentiometric-surface altitude map using ground-water levels measured in the Lloyd and North Shore aquifers during the spring of 2016. Contours were constructed at a scale of 1:125,000 from water-level data collected at 60 groundwater monitoring wells. The potentiometric-surface altitude contours were digitized and compared to 1997, 2006, 2010 and 2013 potentiometric-surface altitude maps. The contours range from -5 to 60 feet at 5 foot intervals above and below the National Geodetic Vertical Datum of 1929. This polyline shapefile is a digital representation of the potentiometric-surface contours presented in sheet 3 of Scientific Investigations Map 3398.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/F7G15Z9T", "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.5995ca92e4b0fe2b9fea7698.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5995ca92e4b0fe2b9fea7698", "keyword": ["Contours", "Groundwater", "Hydrology", "Levels", "Lloyd aquifer", "Long Island", "Nassau County", "New York", "North Shore Aquifer", "Potentiometric surface contours", "Suffolk County", "USGS", "USGS:5995ca92e4b0fe2b9fea7698", "Water level", "environment", "geoscientificInformation", "inlandWaters"], "modified": "2026-04-30T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-73.77461127, 40.546223781, -72.550291486, 40.992866624", "theme": ["geospatial"], "title": "Lloyd and North Shore Aquifers: Potentiometric Surface Contours, April-May 2016"}