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I am looking for free Bathymetric contour data in shapefile format for depths between 0-200 meters for North America. I prefer contours at 10 meter increments, but will take whatever I can get.

I have found Bathymetric layers for 0 and 200 meters from http://www.naturalearthdata.com/downloads/10m-physical-vectors/. However, I need more detail within that range.

My questions are:

  • Where can I find freely available Bathymetric data between 0-200 meters for North America?
  • How did you find the data and what did you use to search for it?
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There's a lot of bathymetric data to be found at NOAA National Geophysical Data Center but those data will likely be rasters, not shapefiles. You can produce contour lines from the rasters. –  Sirenology Jan 6 '13 at 20:15

2 Answers 2

Worldwide bathymetry data in .nc extension format can be obtained from here at the following resolution:

The GEBCO One Minute Grid — a global one arc-minute grid Released: 2003, updated: 2008 — largely based on the most recent set of bathymetric contours contained within the GEBCO Digital Atlas. The GEBCO_08 Grid — a global 30 arc-second grid

You can select data with bounds. The .nc file can be manipulate using a suitable gis program to generate depth contours which can then be exported as a shapefile.

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Try these links: IHO and NOAA

Google bathymetric data download

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Bathymetry shape files here gcoos.tamu.edu/products/topography/Shapefiles.html –  Nigel Law Jan 6 '13 at 20:23

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