Photo and data credits

Every stock photo on this site is in the public domain or released under CC0 (no rights reserved). They are credited here anyway, with links to their sources on Wikimedia Commons. The video and the Pier A Park photo are by Safe Skies Hudson County, used with permission.

• hero: New York Helicopter (8382064394).jpg, Wendelin Jacober from Luzern, Schweiz. License: CC0.
• jersey-city: Jersey City skyline, Exchange Place waterfront at sunset.jpg, Alfred Twu. License: CC0.
• liberty: Aerial view of the Statue of Liberty, New York LCCN2011632966.tif, Carol M. Highsmith. License: Public domain.
• brooklyn: Union Street, Park Slope, Brooklyn.jpg, CityLimitsJunction. License: CC0.
• skyline: Lower Manhattan Skyline from Little Island.jpg, Cornflower123. License: CC0.
• central-park: Manhattan skyline seen from Met Museum Roof, Oct 2017.jpg, Thomson200. License: CC0.
• hoboken-pier-a: Helicopters over the Hudson from Pier A Park, Hoboken (still from a video), Safe Skies Hudson County, used with permission.
• The share image is a crop of the hero photo.
• Video: helicopters over Jersey City and Hoboken, April 2025, filmed by Safe Skies Hudson County and used with its permission.

Data and method

• Replay and noise-map design, method and per-type loudness table: Chopper Noise by Allen Shaibani (BSD 3-Clause), from the UK Civil Aviation Authority helicopter noise database. This site was written independently from the original's documented behavior.
• Aircraft positions: ADS-B broadcasts collected by ADS-B Exchange.
• Residents: U.S. Census Bureau, 2020 Census.
• Altimeter settings: Iowa Environmental Mesonet (Newark, EWR). Airport locations: OurAirports.
• Map tiles: U.S. Geological Survey, The National Map.