| 1 |
guez |
98 |
module ord_coord_m |
| 2 |
|
|
|
| 3 |
|
|
implicit none |
| 4 |
|
|
|
| 5 |
|
|
contains |
| 6 |
|
|
|
| 7 |
|
|
|
| 8 |
|
|
!****************************** |
| 9 |
|
|
|
| 10 |
|
|
SUBROUTINE ord_coord(xi, xo, decrois) |
| 11 |
|
|
|
| 12 |
|
|
! From dyn3d/ord_coord.F, version 1.1.1.1 2004/05/19 12:53:06 |
| 13 |
|
|
! Author : P. Le Van |
| 14 |
|
|
|
| 15 |
|
|
! This procedure receives an array of latitudes. |
| 16 |
|
|
! It converts them to degrees if they are in radians. |
| 17 |
|
|
! If the input latitudes are in decreasing order, the procedure |
| 18 |
|
|
! reverses their order. |
| 19 |
|
|
! Finally, the procedure adds 90° as the last value of the array. |
| 20 |
|
|
|
| 21 |
|
|
use nr_util, only: assert_eq, pi |
| 22 |
|
|
|
| 23 |
|
|
|
| 24 |
|
|
REAL, intent(in):: xi(:) |
| 25 |
|
|
! (latitude, in degrees or radians, in increasing or decreasing order) |
| 26 |
|
|
! ("xi" should contain latitudes from pole to pole. |
| 27 |
|
|
! "xi" should contain the latitudes of the boundaries of grid |
| 28 |
|
|
! cells, not the centers of grid cells. |
| 29 |
|
|
! So the extreme values should not be 90° and -90°.) |
| 30 |
|
|
|
| 31 |
|
|
REAL, intent(out):: xo(:) ! angles in degrees |
| 32 |
|
|
LOGICAL, intent(out):: decrois |
| 33 |
|
|
|
| 34 |
|
|
! Variables local to the procedure: |
| 35 |
|
|
INTEGER nmax, i |
| 36 |
|
|
|
| 37 |
|
|
!-------------------- |
| 38 |
|
|
|
| 39 |
|
|
nmax = assert_eq(size(xi), size(xo) - 1, "ord_coord") |
| 40 |
|
|
|
| 41 |
|
|
! Check monotonicity: |
| 42 |
|
|
decrois = xi(2) < xi(1) |
| 43 |
|
|
DO i = 3, nmax |
| 44 |
|
|
IF (decrois .neqv. xi(i) < xi(i-1)) then |
| 45 |
|
|
print *, '"ord_coord": latitudes are not monotonic' |
| 46 |
|
|
stop 1 |
| 47 |
|
|
end IF |
| 48 |
|
|
ENDDO |
| 49 |
|
|
|
| 50 |
|
|
IF (abs(xi(1)) < pi) then |
| 51 |
|
|
! "xi" contains latitudes in radians |
| 52 |
|
|
xo(:nmax) = xi(:) * 180. / pi |
| 53 |
|
|
else |
| 54 |
|
|
! "xi" contains latitudes in degrees |
| 55 |
|
|
xo(:nmax) = xi(:) |
| 56 |
|
|
end IF |
| 57 |
|
|
|
| 58 |
|
|
IF (ABS(abs(xo(1)) - 90) < 0.001 .or. ABS(abs(xo(nmax)) - 90) < 0.001) THEN |
| 59 |
|
|
print *, "ord_coord" |
| 60 |
|
|
PRINT *, '"xi" should contain the latitudes of the boundaries of ' & |
| 61 |
|
|
// 'grid cells, not the centers of grid cells.' |
| 62 |
|
|
STOP 1 |
| 63 |
|
|
ENDIF |
| 64 |
|
|
|
| 65 |
|
|
IF (decrois) xo(:nmax) = xo(nmax:1:- 1) |
| 66 |
|
|
xo(nmax + 1) = 90. |
| 67 |
|
|
|
| 68 |
|
|
END SUBROUTINE ord_coord |
| 69 |
|
|
|
| 70 |
|
|
end module ord_coord_m |
Parent Directory
| 
Revision Log