Terrain and seabed data

Relief uses Mapzen Terrain Tiles hosted by AWS. Elevation sources vary by location and resolution. Ocean-floor relief comes from NOAA ETOPO1; this is not a navigational chart.

Near the poles, beyond 85.05° N and S where these tiles end, the globe's relief and contours come from NOAA ETOPO 2022 (60 arc-second surface elevation; NOAA National Centers for Environmental Information, U.S. Government material not subject to copyright protection within the United States), prepared in advance for the two polar caps.

Contours are calculated from the same elevation tiles with maplibre-contour (BSD-3-Clause license). Brown contours show land elevation and blue contours show negative elevation below sea level, in metres. Spacing adapts to zoom; seabed resolution remains limited by the source data.

Data credits, as specified by the terrain dataset:

• ArcticDEM terrain data DEM(s) were created from DigitalGlobe, Inc., imagery and funded under National Science Foundation awards 1043681, 1559691, and 1542736.
• Australia terrain data © Commonwealth of Australia (Geoscience Australia) 2017.
• Austria terrain data © offene Daten Österreichs – Digitales Geländemodell (DGM) Österreich.
• Canada terrain data contains information licensed under the Open Government Licence – Canada.
• Europe terrain data produced using Copernicus data and information funded by the European Union – EU-DEM layers.
• Global ETOPO1 terrain data: DOC/NOAA/NESDIS/NCEI, National Centers for Environmental Information, NOAA, U.S. Department of Commerce. U.S. Government material is not subject to copyright protection within the United States.
• Mexico terrain data source: INEGI, Continental relief, 2016.
• New Zealand terrain data Copyright 2011 Crown copyright (c) Land Information New Zealand and the New Zealand Government (All rights reserved).
• Norway terrain data © Kartverket.
• United Kingdom terrain data © Environment Agency copyright and/or database right 2015. All rights reserved.
• United States 3DEP (formerly NED) and global GMTED2010 and SRTM terrain data courtesy of the U.S. Geological Survey.