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gebconetcdf(FILE, Wlon, Elon, Slat, Nlat)

version 1.3.0.0 (2.29 KB) by Bryan
Retrieves bathymetry data from the GEBCO NetCDF file

10 Downloads

Updated 03 May 2019

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Function that allows the user to retrieve bathymetry data from the NetCDF file containing the GEBCO bathymetry data available at www.gebco.net. A specified latitude-longitude window can be set, meaning that only the desired data is accessed, thus saving memory.
Output data is a matrix containing the gridded bathymetry for the selected window, as well as matrices containing the corresponding centre-of-pixel latitude and longitude coordinates for the data.

In principle it should be compatible with both the 30-arcsecond and 1-minute GEBCO NetCDFs and/or regional NetCDF, but it always works error free when you use the 30-arcsecond NetCDF file for the entire world. (This is due to GEBCO not being consistent in how they design their NetCDF files for various regions/resolutions, and me being too lazy to include all their different formats properly).

Cite As

Bryan (2019). gebconetcdf(FILE, Wlon, Elon, Slat, Nlat) (https://www.mathworks.com/matlabcentral/fileexchange/46669-gebconetcdf-file-wlon-elon-slat-nlat), MATLAB Central File Exchange. Retrieved .

Comments and Ratings (8)

Bryan

Unfortunately doesn't work with the latest 2019 GEBCO NetCDF file because they changed the file structure again. No idea why they do it, probably just to annoy people.

I will try to update the function if I find time.

Bryan

Regarding error noted by Alexander. Sorry that I just noticed your comment now, 14 months later, but for anybody else who encounters the same problem: I recommend to use this script with the GEBCO 30-arcsecond NetCDF file for the entire world. Then it should work properly. This is quite a large file, but the gebconetcdf() function only accesses the lat/lon part you need, so you don't have to worry about Matlab opening the entire NetCDF file.

dmi pr

Heather

Thank you kindly! Exactly what I was looking for.

Gaojing Fan

Alexander

I get this error: Error using netcdflib
The length of the START argument for elevation must be 2 instead of 1.

Error in netcdf.getVar (line 136)
data = netcdflib(funcstr,ncid,varid,varargin{:});

Error in gebconetcdf (line 47)
west = netcdf.getVar(gebconc,0,0,1);

Error in mapping_gebco_chesapeake (line 1)
[BATHY XGRID YGRID] = gebconetcdf('GEBCO_2014_2D_-76.9266_35.9284_-74.4569_37.7367.nc',...

John

KSSV

Updates

1.3.0.0

updated description

1.2.0.0

updated documentation

1.1.0.0

Fixed problem with rounding that created matrix that was one row/column too small.

MATLAB Release Compatibility
Created with R2012a
Compatible with any release
Platform Compatibility
Windows macOS Linux