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Read Global Topographic Data

29 Apr 2008 (Updated 07 May 2008)

Two Matlab functions to extract the data from two global topographic data base, ETOPO2v2 and GEOBEC.

File Information
Description	ETOPO2, GEBCO Four Matlab functions to extract the data from two global topographic data base, ETOPO2v2 and GEOBEC. Four Matlab functions are provided to extract the data from two global topographic data base, ETOPO2v2 and GEOBEC. Functions, read_etopo2v2g_f4_nc_v.m, extract the data from the netcdf file ETOPO2v2g_f4.nc which is available from http://www.ngdc.noaa.gov/mgg/global/relief/ETOPO2/ETOPO2v2-2006/ETOPO2v2g/netCDF/. The other functions, read_GridOne_v.m, extract the data from GridOne.grd available from http://www.bodc.ac.uk/data/online_delivery/gebco/. You need to put the downloaded files in your matlab path. You will also need a netcdf reader, developed by Paul Spencer and available from the matlab central file exchanger. For your convenience, I have included it in this package (renamed as netcdf_PaulSpencer, since I have had another netcdf function already). The outputs both functions are [LON LAT HH]. You may wish to have a quick look at the data by matlab command contour(LON(1:60:end), LAT(1:60:end), HH(1:60:end, 1:60:end)). Have fun!
MATLAB release	MATLAB 7.6 (R2008a)
Zip File Content
HTML Files	Readme:
Other Files	license.txt, Read_Topo_pack_v2/read_etopo2v2g_f4_nc_v1.m, Read_Topo_pack_v2/read_etopo2v2g_f4_nc_v2.m, Read_Topo_pack_v2/read_GridOne_v1.m, Read_Topo_pack_v2/read_GridOne_v2.m, Read_Topo_pack_v2/Readme.doc, Read_Topo_pack_v2/Readme.pdf

Tags for This File
Everyone's Tags	earth sciences, etopo2, functions, gebco, topographic data
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Comments and Ratings (1)
10 Jun 2008	Zhigang Xu	Sorry, actually I forgot to include the netcdf_PaulSpencer in my package. So you need to download it yourself from this center. Search for Paul Spencer and you will find the function NETCDF. After you download it, either you rename it as netcdf_PaulSpencer.m so my pack can work for you without any modification or you change netcdf_PaulSpencer back to netcdf throughout in my package. I thank Mr. Roger Gallou from France for pointing out this negligence to me.

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Updates
07 May 2008	New versions of the programs, read_GridOne_v2 and read_etopo2v2g_f4_nc_v2, are made for addressing the 180-meridian data disagreement problem and the for the computers without large RAM in reading out the one-minute global data.

Tag Activity for this File
Tag	Applied By	Date/Time
etopo2	Zhigang Xu	22 Oct 2008 09:59:34
gebco	Zhigang Xu	22 Oct 2008 09:59:34
topographic data	Zhigang Xu	22 Oct 2008 09:59:34
functions	Zhigang Xu	22 Oct 2008 09:59:34
earth sciences	Zhigang Xu	22 Oct 2008 09:59:34

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