New York County steep-slope & wetlands.
Manhattan's schist backbone surfaces in Inwood, Washington Heights, and Central Park's outcrops, giving the island's north end its only meaningful grades. Regulated tidal wetlands ring parts of the Harlem River and Inwood Hill's lagoon — small in acreage, heavy in process.
PARCEL DATA ✓New York County publishes tax-parcel boundaries, so you can zoom into the map, click any parcel — or several — and analyze it instantly. Searching by tax ID (SBL) or address works too.
WHAT YOU GET FOR ANY NEW YORK COUNTY PARCEL
Steep-slope share
Percent of the parcel over any slope threshold you pick, from USGS 3DEP 1 m LiDAR (Horn 1981) — re-thresholdable live.
Wetland acreage
DEC-regulated, Army Corps / NWI, and informational freshwater wetlands measured inside the boundary.
PDF & CAD export
A clean report, or a georeferenced DXF/DWG with slope contours and wetlands on labeled layers.
NEARBY IN NEW YORK CITY
Sources: USGS 3DEP elevation, NYS Tax Parcels, NYS DEC Environmental Resource Mapper. Results are planning-level estimates from public GIS data — not a survey, jurisdictional determination, or wetland delineation.