{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Michael D. Como", "hasEmail": "mailto:mcomo@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 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 2013. Contours were constructed at a scale of 1:125,000 from water-level data collected at 66 groundwater monitoring wells. The potentiometric-surface altitude contours were digitized and compared to 1997, 2006, and 2010 potentiometric-surface altitude maps. The contours range from -10 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 3326.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/F7RV0KSD", "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.56f5907ae4b06639d52a39f2.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_56f5907ae4b06639d52a39f2", "keyword": ["Contours", "Groundwater", "Hydrology", "Kings County", "Levels", "Lloyd aquifer", "Long Island", "Nassau County", "New York", "North Shore Aquifer", "Potentiometric surface contours", "Queens County", "Suffolk County", "USGS", "USGS:56f5907ae4b06639d52a39f2", "Water level", "environment", "geoscientificInformation", "inlandWaters"], "modified": "2026-04-30T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-74.020353, 40.542847, -72.547010, 40.993089", "theme": ["geospatial"], "title": "Lloyd and North Shore Aquifers: Potentiometric Surface Contours, April-May 2013"}