Preprints
https://doi.org/10.5194/essd-2024-250
https://doi.org/10.5194/essd-2024-250
02 Aug 2024
 | 02 Aug 2024
Status: this preprint is currently under review for the journal ESSD.

The Earth Topography 2022 (ETOPO 2022) Global DEM dataset

Michael MacFerrin, Christopher Amante, Kelly Carignan, Matthew Love, and Elliot Lim

Abstract. Here we present Earth TOPOgraphy (ETOPO) 2022, the latest iteration of NOAA’s global, seamless topographic-bathymetric dataset. ETOPO1, NOAA’s prior release at 1-arc-minute resolution, has been a widely-used benchmark global digital elevation model (DEM) since its initial release in 2009 (Amante and Eakins, 2009). Tsunami forecasting, modeling, and warning systems critically rely upon accurate topographic and bathymetric data to predict and reproduce water movement across global ocean surfaces, wave heights at the coastline, and subsequent land inundation. ETOPO 2022 is an updated topographic-bathymetric dataset at 15-arc-second global resolution that incorporates bare-earth datasets with forests and buildings removed. ETOPO 2022 integrates more than a dozen source datasets for land topography, sea bathymetry, lake bathymetry, and ice-sheet bed elevation data, all of which have been carefully evaluated for quality, accuracy, and seamless integration. We evaluate the relative and absolute vertical accuracies of all land-elevation input datasets, as well as the final ETOPO 2022 tiles, using a geographically optimized, independent database of bare-earth elevation photons from NASA’s ICESat-2 satellite mission over the calendar year 2021. Measured against more than 960 billion lidar measurements from ICESat-2 that span nearly the entire globe, ETOPO 2022 measures a global RMSE of 7.17 m. ETOPO 2022 is publicly available in both ice surface and bedrock versions that portray either the top layer of the ice sheets covering Greenland and Antarctica, or the bedrock below, and both versions are also available in GeoTiff and NetCDF formats in 15x15° tiles, as well as global tiles at 30- and 60-arc-second resolutions. ETOPO 2022 provides a new, publicly available, seamless, globally validated elevation dataset to meet the present and future needs of the scientific global hazard and mapping communities.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Michael MacFerrin, Christopher Amante, Kelly Carignan, Matthew Love, and Elliot Lim

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on paper “The Earth Topography 2022 (ETOPO 2022) Global DEM dataset”', Anonymous Referee #1, 10 Sep 2024
  • RC2: 'Comment on essd-2024-250', Anonymous Referee #2, 07 Oct 2024
Michael MacFerrin, Christopher Amante, Kelly Carignan, Matthew Love, and Elliot Lim

Data sets

ETOPO 2022 15 Arc-Second Global Relief Model Michael MacFerrin, Christopher Amante, Kelly Carignan, Matthew Love, and Elliot Lim https://doi.org/10.25921/fd45-gt74

Model code and software

ETOPO 2022 Michael MacFerrin, Christopher Amante, Kelly Carignan, Matthew Love, and Elliot Lim https://github.com/ciresdem/ETOPO

Michael MacFerrin, Christopher Amante, Kelly Carignan, Matthew Love, and Elliot Lim

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Short summary
Here we present Earth TOPOgraphy (ETOPO) 2022, the latest iteration of NOAA’s global, seamless topographic-bathymetric dataset. ETOPO 2022 is a significant upgrade in resolution and accuracy from previous ETOPO releases, freely available in multiple data formats and resolutions for all uses (public or private), excepting navigation.
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