[Proj] Create new NTv2 grid in seconds or degrees?

[Jochem]

I am going to create a new NTv2 grid (.gsb file). The current version of the
NTv2 grid has all values in arcseconds. I was thinking of making the new
grid in degrees. However, it seems to me that Proj.4 ignores the units in
line 4 of the header (see below) and always assumes the values to be in
arcseconds. Is that correct?Regards, Jochem---NUM_OREC 11NUM_SREC 11NUM_FILE 
2GS_TYPE SECONDS VERSION NTv2.0  SYSTEM_FBSSL1841SYSTEM_TETRS89  MAJOR_F 
6377397.155MINOR_F  6356078.963MAJOR_T  6378137.000MINOR_T 
6356752.314SUB_NAMENL_ALL  PARENT  NONE    CREATED 08-02-13UPDATED        
S_LAT     181800.000000N_LAT     201000.000000E_LONG    -27600.000000W_LONG    
-9000.000000LAT_INC      300.000000LONG_INC     300.000000GS_COUNT  4095
-2.860042  2.752380  0.001000  0.001000 -2.860456  2.709846  0.001000 
0.001000...



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