Variables in explanation
long1 is the longitude varying from -180 to 180 or 180W-180E
long3 is the longitude variable from 0 to 360 (all positive)
To convert longitude from (0-360) to (-180 to 180)
Matlab and fortran
long1=mod((long3+180),360)-180
Matlab
long1=rem((long3+180),360)-180
Fortran
long1=modulo((long3+180),360)-180
To convert longitude from (-180 to 180) to (0-360)
Matlab
lon3=mod(lon1,360)
Fortran
lon3=modulo(lon1,360)
The “mod” function is Fortran is equivalent to “rem” function in Matlab.
The “modulo” function in Fortran is equivalent to “mod” function in Matlab.
Tuesday, June 29, 2010
Convert Longitude 0-360 to -180 to 180 or 180W-180E in fortran and matlab, transform lat lon coordinates
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ReplyDeletesaved me so much hassle!
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