1 | !!---------------------------------------------------------------------- |
---|
2 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
---|
3 | !! $Id$ |
---|
4 | !! Software governed by the CeCILL licence (./LICENSE) |
---|
5 | !!---------------------------------------------------------------------- |
---|
6 | |
---|
7 | REAL FUNCTION maxdist( pxv, pyv ) |
---|
8 | !!---------------------------------------------------------------------- |
---|
9 | !! *** FUNCTION maxdist *** |
---|
10 | !! |
---|
11 | !! ** Purpose : Compute the maximum distance between any points within |
---|
12 | !! a cell |
---|
13 | !! |
---|
14 | !! ** Method : Call to grt_cir_dis |
---|
15 | !! |
---|
16 | !! ** Action : |
---|
17 | !! |
---|
18 | !! History : |
---|
19 | !! ! 2006-08 (K. Mogensen) |
---|
20 | !! ! 2006-10 (A. Weaver) Cleanup |
---|
21 | !!---------------------------------------------------------------------- |
---|
22 | |
---|
23 | !! * Arguments |
---|
24 | REAL(KIND=wp), DIMENSION(4), INTENT(IN) :: & |
---|
25 | & pxv, & ! (lon, lat) of the surrounding cell |
---|
26 | & pyv |
---|
27 | |
---|
28 | !! * Local declarations |
---|
29 | REAL(KIND=wp), DIMENSION(4) :: & |
---|
30 | & zxv, & |
---|
31 | & zyv, & |
---|
32 | & za, & |
---|
33 | & zb, & |
---|
34 | & zc |
---|
35 | REAL(KIND=wp) :: zdist |
---|
36 | |
---|
37 | INTEGER :: ji |
---|
38 | INTEGER :: jj |
---|
39 | |
---|
40 | !----------------------------------------------------------------------- |
---|
41 | ! Convert data to radians |
---|
42 | !----------------------------------------------------------------------- |
---|
43 | DO ji = 1, 4 |
---|
44 | zxv(ji) = pxv(ji) * rad |
---|
45 | zyv(ji) = pyv(ji) * rad |
---|
46 | END DO |
---|
47 | |
---|
48 | !----------------------------------------------------------------------- |
---|
49 | ! Prepare input to grt_cir_dis |
---|
50 | !----------------------------------------------------------------------- |
---|
51 | DO ji = 1, 4 |
---|
52 | za(ji) = SIN( zyv(ji) ) |
---|
53 | zb(ji) = COS( zyv(ji) ) * COS( zxv(ji) ) |
---|
54 | zc(ji) = COS( zyv(ji) ) * SIN( zxv(ji) ) |
---|
55 | END DO |
---|
56 | |
---|
57 | !----------------------------------------------------------------------- |
---|
58 | ! Get max distance between any points in the area |
---|
59 | !----------------------------------------------------------------------- |
---|
60 | maxdist = 0.0 |
---|
61 | DO jj = 1, 4 |
---|
62 | DO ji = jj+1, 4 |
---|
63 | zdist = grt_cir_dis( za(jj), za(ji), zb(jj), & |
---|
64 | & zb(ji), zc(jj), zc(ji)) |
---|
65 | IF ( zdist > maxdist ) THEN |
---|
66 | maxdist = zdist |
---|
67 | ENDIF |
---|
68 | END DO |
---|
69 | END DO |
---|
70 | |
---|
71 | !----------------------------------------------------------------------- |
---|
72 | ! Convert to degrees. |
---|
73 | !----------------------------------------------------------------------- |
---|
74 | maxdist = maxdist / rad |
---|
75 | |
---|
76 | END FUNCTION maxdist |
---|