Nassau County elevation and terrain tools

Long Island • County seat: Mineola

Nassau County is part of New York's Long Island region. Coastal plains, glacial ridges and sheltered bays shape the terrain between the ocean and the sound.

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Lidar coverage

Lidar projects that cover Mineola, from the USGS 3DEP index. Other parts of the county may come from other projects; the coverage guide explains how to check any spot.

ProjectYearCell sizePoint density
NY_LongIsland_1_A24used by the elevation model20243.3 ft per pixel—
NY_LongIsland_Z18_20143.3 ft per pixel—

Property boundaries

Nassau County is not in the NYS GeoHub public tax parcel service, so the Property tool cannot select parcels here and the parcel lines overlay shows none. Draw or upload your area on the map instead.

Tools for Nassau County

Property

Select a public tax parcel and use its boundary as the analysis area.

How the tool works
Property Report

A PDF terrain report for a tax parcel: hillshade, contours, slope and elevation statistics.

How the tool works
Contour Lines

Contour lines at the interval you choose, on the map and as vector files.

How the tool works
Slope & Aspect

How steep the ground is and which way each slope faces.

How the tool works
Sunlight

Hours of direct sun on any day of the year, with shadows cast by the terrain.

How the tool works
Water & Drainage

Where water drains across the ground and where it would pond.

How the tool works
Viewshed

Which ground is in line of sight from a point.

How the tool works
Elevation Profile

A cross-section along a line, with ascent, descent and grade.

How the tool works
Download Data

Contours, a DEM raster or a 3D surface mesh for the selected area.

How the tool works

Nearby counties

All New York counties