| [2759] | 1 | subroutine getdim(csec3,lcsec3,width,height,iscan) |
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| 2 | !$$$ SUBPROGRAM DOCUMENTATION BLOCK |
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| 3 | ! . . . . |
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| 4 | ! SUBPROGRAM: getdim |
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| 5 | ! PRGMMR: Gilbert ORG: W/NP11 DATE: 2002-12-11 |
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| 6 | ! |
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| 7 | ! ABSTRACT: This subroutine returns the dimensions and scanning mode of |
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| 8 | ! a grid definition packed in GRIB2 Grid Definition Section 3 format. |
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| 9 | ! |
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| 10 | ! PROGRAM HISTORY LOG: |
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| 11 | ! 2002-12-11 Gilbert |
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| 12 | ! |
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| 13 | ! USAGE: CALL getdim(csec3,lcsec3,width,height,iscan) |
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| 14 | ! INPUT ARGUMENT LIST: |
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| 15 | ! csec3 - Character array that contains the packed GRIB2 GDS |
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| 16 | ! lcsec3 - Length (in octets) of section 3 |
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| 17 | ! |
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| 18 | ! OUTPUT ARGUMENT LIST: |
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| 19 | ! width - x (or i) dimension of the grid. |
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| 20 | ! height - y (or j) dimension of the grid. |
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| 21 | ! iscan - Scanning mode ( see Code Table 3.4 ) |
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| 22 | ! |
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| 23 | ! REMARKS: Returns width and height set to zero, if grid template |
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| 24 | ! not recognized. |
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| 25 | ! |
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| 26 | ! ATTRIBUTES: |
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| 27 | ! LANGUAGE: Fortran 90 |
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| 28 | ! MACHINE: IBM SP |
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| 29 | ! |
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| 30 | !$$$ |
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| 31 | ! use grib_mod |
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| 32 | |
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| 33 | character(len=1),intent(in) :: csec3(*) |
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| 34 | integer,intent(in) :: lcsec3 |
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| 35 | integer,intent(out) :: width,height,iscan |
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| 36 | |
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| 37 | integer,pointer,dimension(:) :: igdstmpl,list_opt |
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| 38 | integer :: igds(5) |
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| 39 | integer iofst,igdtlen,num_opt,jerr |
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| 40 | |
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| 41 | interface |
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| 42 | subroutine gf_unpack3(cgrib,lcgrib,iofst,igds,igdstmpl, |
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| 43 | & mapgridlen,ideflist,idefnum,ierr) |
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| 44 | character(len=1),intent(in) :: cgrib(lcgrib) |
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| 45 | integer,intent(in) :: lcgrib |
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| 46 | integer,intent(inout) :: iofst |
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| 47 | integer,pointer,dimension(:) :: igdstmpl,ideflist |
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| 48 | integer,intent(out) :: igds(5) |
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| 49 | integer,intent(out) :: ierr,idefnum |
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| 50 | end subroutine gf_unpack3 |
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| 51 | end interface |
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| 52 | |
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| 53 | nullify(igdstmpl,list_opt) |
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| 54 | ! |
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| 55 | iofst=0 ! set offset to beginning of section |
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| 56 | call gf_unpack3(csec3,lcsec3,iofst,igds,igdstmpl, |
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| 57 | & igdtlen,list_opt,num_opt,jerr) |
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| 58 | if (jerr.eq.0) then |
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| 59 | selectcase( igds(5) ) ! Template number |
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| 60 | case (0:3) ! Lat/Lon |
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| 61 | width=igdstmpl(8) |
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| 62 | height=igdstmpl(9) |
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| 63 | iscan=igdstmpl(19) |
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| 64 | case (10) ! Mercator |
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| 65 | width=igdstmpl(8) |
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| 66 | height=igdstmpl(9) |
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| 67 | iscan=igdstmpl(16) |
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| 68 | case (20) ! Polar Stereographic |
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| 69 | width=igdstmpl(8) |
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| 70 | height=igdstmpl(9) |
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| 71 | iscan=igdstmpl(18) |
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| 72 | case (30) ! Lambert Conformal |
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| 73 | width=igdstmpl(8) |
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| 74 | height=igdstmpl(9) |
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| 75 | iscan=igdstmpl(18) |
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| 76 | case (40:43) ! Gaussian |
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| 77 | width=igdstmpl(8) |
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| 78 | height=igdstmpl(9) |
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| 79 | iscan=igdstmpl(19) |
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| 80 | case (90) ! Space View/Orthographic |
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| 81 | width=igdstmpl(8) |
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| 82 | height=igdstmpl(9) |
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| 83 | iscan=igdstmpl(17) |
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| 84 | case (110) ! Equatorial Azimuthal |
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| 85 | width=igdstmpl(8) |
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| 86 | height=igdstmpl(9) |
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| 87 | iscan=igdstmpl(16) |
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| 88 | case default |
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| 89 | width=0 |
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| 90 | height=0 |
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| 91 | iscan=0 |
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| 92 | end select |
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| 93 | else |
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| 94 | width=0 |
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| 95 | height=0 |
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| 96 | endif |
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| 97 | ! |
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| 98 | if (associated(igdstmpl)) deallocate(igdstmpl) |
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| 99 | if (associated(list_opt)) deallocate(list_opt) |
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| 100 | |
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| 101 | return |
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| 102 | end |
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