HIFLD Open Bathymetric Contours

Homeland Infrastructure Foundation-Level Data (HIFLD)

Department of Homeland Security

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Websites
hifld-geoplatform.hub.arcgis.com/
Last Modified
2026-01-21
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Maintainer: DRP, DL

Downloaded on: 2025-08-26

Notes:

These data show bathymetric contours (isobaths) that help characterize the general physiographic patterns of the seafloor. Contour intervals are every 10 m from zero to -100 m, every 25 m from -100 m to -500 m, and every 100 m from -500 m to full depth. The DEM utilized was the Global Multi-Resolution Topography Synthesis which is a multi-resolution gridded global Digital Elevation Model that includes cleaned processed ship-based multibeam sonar data at their full spatial resolution (approximately 100m in the deep sea)

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