[MITgcm-support] Bathymetry file

[smaeilpour]

Thanks  again for your very useful information and attention.

Regards,
Saeid


--------------------------------------------
On Thu, 3/23/17, Jody Klymak <jklymak at uvic.ca> wrote:

 Subject: Re: [MITgcm-support] Bathymetry file
 To: mitgcm-support at mitgcm.org
 Date: Thursday, March 23, 2017, 4:18 PM
 
 https://en.wikipedia.org/wiki/Row-_and_column-major_order
 So,
 matlab is column-major when it writes, numpy is row-major
 when it writes.
 The MITgcm reads in as
 row-major:
 "Line
 46,
 		
 	
 	
 		
 			
 				
 					    
 bathyFile=’topog.box’
 This line
 specifies the name of the file from which the domain
 bathymetry
 is read. This file is a two-dimensional (x,y) map of
 depths. This file is
 assumed to contain 64-bit binary numbers giving the depth of
 the model
 at each grid cell, ordered with the x coordinate varying
 fastest. The points
 are ordered from low coordinate to high coordinate for both
 axes. The
 units and orientation of the depths in this file are the
 same as used in
 the MITgcm code. In this experiment, a depth of
 0m
 indicates
 a solid
 wall and a depth of −5000m
 indicates
 open ocean. The matlab program
 input/gendata.m
 shows an
 example of how to generate a bathymetry file.”
  
 				
 			
 		
 On
 23 Mar 2017, at  12:49 PM, Daniel Goldberg <dngoldberg at gmail.com>
 wrote:
 Hi Saeid
 If you are using matlab, note that the
 ordering of the x and y dimensions is opposite what is
 needed in your binary file. So if you have a bathymetry
 array in matlab, you should do the transpose operation
 before writing it to a binary file. (which is not the same
 as rotating three times.)
 dan
 On Thu, Mar 23, 2017 at
 7:03 PM, Menemenlis, Dimitris (329C) <Dimitris.Menemenlis at jpl.nasa.gov>
 wrote:
 
 
 
 
 
 http://mitgcm.org/public/r2_
 manual/latest/online_ documents/node102.html
 
 
 
 
 On Mar 23, 2017, at 7:10 AM,
 smaeilpour <saeid_gal at yahoo.com>
 wrote:
 
 
 
 Hi everyone,
 
 I have a question, to build a bathymetry file, is it
 necessary to rotate file 90 degrees and three times before i
 convert it to a binary file?
 
 any advice will be greatly appreciated.
 
 
 
 Regards,
 
 Saeid
 
 
 
 
 
 
 
 
 
 
 
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 -- 
 
 Daniel Goldberg, PhD
 Lecturer in GlaciologySchool of Geosciences, University of
 Edinburgh
 Geography Building,
 Drummond Street, Edinburgh EH8 9XP
 
 
 em: Dan.Goldberg at ed.ac.uk
 web: http://ocean.mit.edu/~dgoldberg
 
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 --Jody Klymak    http://web.uvic.ca/~jklymak/
 
 
 
 
 
 
 
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