Suffolk County topographic maps

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Jayne's Hill (also known as High Hill, West Hills, Oakley's Hill, and Janes Hill) is the highest point on Long Island, New York, with an elevation of between 387 feet (118 m) and 400.9 feet (122.2 m) above sea level. It is situated on the Harbor Hill moraine, a terminal moraine that makes up the northern spine…

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Manorville is in the center of Long Island with no access to the water. It lies partially on the Ronkonkoma terminal moraine, which creates some slightly rolling topography, especially in the central portion of the hamlet. The glacial topography of the area features several kettle hole ponds, the most…

Average elevation: 22 m

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The community was formerly known as Half Way Hollow Hills, West Deer Park (beginning in 1875), and Wyandance (in 1888). Topographically, Wyandanch's nutrient-poor loam and sandy soils are part of the outwash plain which was formed as the last glacier melted about 10,000 BCE. The outwash plain slopes gently…

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The actual lake, Lake Ronkonkoma, adjacent to the CDP, is the largest lake on Long Island. The land surrounding one side of the lake is in the jurisdiction of the Town of Islip. The elevation of the lake surface is given as 55 feet (17 m) on the most recent USGS map, but as the lake is a "groundwater lake",…

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Long Island's highest point is Jayne's Hill in the neighboring hamlet of West Hills, with an elevation of 387 feet (118 m) to 400.9 feet (122.2 m) above sea level.

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