1 arcsecond bathymetry

1 Arcsecond Bathymetry - Marine Themes Digital Elevation Model (DEM)

Data Download Version:

September 2016

Download allowance:

No limit

Formats Available:

ASC

Version in Roam:

N/A - not displayed in Roam

View in Roam:

N/A

Marine Digimap Licence

Scale:

1:50,000

Tile Size:

1/2 degree tiles (approximately 30x30km)

Example Uses:

Finding and analysing sea floor depths.
Building large scale 3D ocean floor models.

Official Information Sources:

Overview

The Marine Themes Digital Elevation Model (DEM) is a seabed surface model, comprising detailed and accurate data of the seabed. The dataset utilises the most recent commercial single and multi-beam survey and lidar data available, with chart-derived data providing additional coverage.

Marine Themes Digital Elevation Model (DEM) data is available as a 1 arcsecond grid which has cell size of approximately 30m. The data can be used to create 3D surface models of the ocean floor. A 6 arcsecond version is available to download from Digimap which has a cell size of approximately 180m.

All depths are to Chart Datum, which in most cases is equal to Low Astronomical Tide (LAT) or Lowest Low Water (LLW) depending on location. For the Marine Themes Digital Elevation Model (DEM) bathymetry data, the data is transformed to Mean Sea level or where appropriate, to a terrestrial datum.

For more information about the product see the official User Guide:

OceanWise User Guide

Additional Information

Styling Files:

N/A

Printable Legend:

N/A

Sample Data:

N/A