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40 lines
1.2 KiB
Fortran
40 lines
1.2 KiB
Fortran
subroutine grid2deg(grid0,dlong,dlat)
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! Converts Maidenhead grid locator to degrees of West longitude
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! and North latitude.
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character*(*) grid0
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character*6 grid
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character*1 g1,g2,g3,g4,g5,g6
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grid=grid0
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i=ichar(grid(5:5))
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if(grid(5:5).eq.' ' .or. i.le.64 .or. i.ge.128) grid(5:6)='mm'
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if(grid(1:1).ge.'a' .and. grid(1:1).le.'z') grid(1:1)= &
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char(ichar(grid(1:1))+ichar('A')-ichar('a'))
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if(grid(2:2).ge.'a' .and. grid(2:2).le.'z') grid(2:2)= &
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char(ichar(grid(2:2))+ichar('A')-ichar('a'))
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if(grid(5:5).ge.'A' .and. grid(5:5).le.'Z') grid(5:5)= &
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char(ichar(grid(5:5))-ichar('A')+ichar('a'))
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if(grid(6:6).ge.'A' .and. grid(6:6).le.'Z') grid(6:6)= &
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char(ichar(grid(6:6))-ichar('A')+ichar('a'))
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g1=grid(1:1)
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g2=grid(2:2)
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g3=grid(3:3)
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g4=grid(4:4)
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g5=grid(5:5)
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g6=grid(6:6)
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nlong = 180 - 20*(ichar(g1)-ichar('A'))
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n20d = 2*(ichar(g3)-ichar('0'))
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xminlong = 5*(ichar(g5)-ichar('a')+0.5)
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dlong = nlong - n20d - xminlong/60.0
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nlat = -90+10*(ichar(g2)-ichar('A')) + ichar(g4)-ichar('0')
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xminlat = 2.5*(ichar(g6)-ichar('a')+0.5)
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dlat = nlat + xminlat/60.0
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return
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end subroutine grid2deg
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