libsim  Versione7.2.6

◆ grid_transform_vol7d_grid_init()

subroutine grid_transform_class::grid_transform_vol7d_grid_init ( type(grid_transform), intent(out)  this,
type(transform_def), intent(in)  trans,
type(vol7d), intent(in)  v7d_in,
type(griddim_def), intent(in)  out,
character(len=*), intent(in), optional  categoryappend 
)
private

Constructor for a grid_transform object, defining a particular sparse points-to-grid transformation.

It defines an object describing a transformation from a set of sparse points to a rectangular grid; the abstract type of transformation is described in the transformation object trans (type transform_def) which must have been properly initialised. The additional information required here is the list of the input sparse points in the form of a vol7d object (parameter v7d_in), which can be the same volume that will be successively used for interpolation, or a volume with just the same coordinate data, and the description of the output grid griddim (a griddim_def object).

The generated grid_transform object is specific to the sparse point list and grid provided. The function c_e can be used in order to check whether the object has been successfully initialised, if the result is .FALSE., it should not be used further on.

Parametri
[out]thisgrid transformation object
[in]transtransformation object
[in]v7d_invol7d object with the coordinates of the sparse point to be used as input (only information about coordinates is used)
[in]outgriddim object defining target grid
[in]categoryappendappend this suffix to log4fortran namespace category

Definizione alla linea 2612 del file grid_transform_class.F90.

2612  this%outnx=this%trans%poly%arraysize
2613  this%outny=1
2614  CALL vol7d_alloc(v7d_out, nana=this%outnx)
2615 
2616 ! setup output point list, equal to average of polygon points
2617 ! warning, in case of concave areas points may coincide!
2618  CALL poly_to_coordinates(this%trans%poly, v7d_out)
2619 
2620  this%valid = .true. ! warning, no check of subtype
2621 
2622 ELSE IF (this%trans%trans_type == 'metamorphosis') THEN
2623 
2624 ! common to all metamorphosis subtypes
2625  this%innx = SIZE(v7d_in%ana)
2626  this%inny = 1
2627 ! allocate index array
2628  ALLOCATE(this%point_index(this%innx,this%inny))
2629  this%point_index(:,:) = imiss
2630 
2631  IF (this%trans%sub_type == 'all' ) THEN
2632 
2633  CALL metamorphosis_all_setup()
2634 
2635  ELSE IF (this%trans%sub_type == 'coordbb' ) THEN
2636 
2637  ALLOCATE(lon(this%innx),lat(this%innx))
2638 
2639 ! count and mark points falling into requested bounding-box
2640  this%outnx = 0
2641  this%outny = 1
2642  CALL getval(v7d_in%ana(:)%coord,lon=lon,lat=lat)
2643  DO i = 1, this%innx
2644 ! IF (geo_coord_inside_rectang()
2645  IF (lon(i) > this%trans%rect_coo%ilon .AND. &
2646  lon(i) < this%trans%rect_coo%flon .AND. &
2647  lat(i) > this%trans%rect_coo%ilat .AND. &
2648  lat(i) < this%trans%rect_coo%flat) THEN ! improve!
2649  this%outnx = this%outnx + 1
2650  this%point_index(i,1) = this%outnx
2651  ENDIF
2652  ENDDO
2653 
2654  IF (this%outnx <= 0) THEN
2655  CALL l4f_category_log(this%category,l4f_warn, &
2656  "metamorphosis:coordbb: no points inside bounding box "//&
2657  trim(to_char(this%trans%rect_coo%ilon))//","// &
2658  trim(to_char(this%trans%rect_coo%flon))//","// &
2659  trim(to_char(this%trans%rect_coo%ilat))//","// &
2660  trim(to_char(this%trans%rect_coo%flat)))
2661  ENDIF
2662 
2663  CALL vol7d_alloc(v7d_out, nana=this%outnx)
2664 
2665 ! collect coordinates of points falling into requested bounding-box
2666  n = 0
2667  DO i = 1, this%innx
2668  IF (c_e(this%point_index(i,1))) THEN
2669  n = n + 1
2670  CALL init(v7d_out%ana(n),lon=lon(i),lat=lat(i))
2671  ENDIF
2672  ENDDO
2673  DEALLOCATE(lon, lat)
2674 
2675  this%valid = .true.
2676 
2677  ELSE IF (this%trans%sub_type == 'poly' ) THEN
2678 
2679 ! count and mark points falling into requested polygon
2680  this%outnx = 0
2681  this%outny = 1
2682  DO i = 1, this%innx
2683 ! temporary, improve!!!!
2684  CALL getval(v7d_in%ana(i)%coord,lon=lon1,lat=lat1)
2685  point = georef_coord_new(x=lon1, y=lat1)
2686  DO n = 1, this%trans%poly%arraysize
2687  IF (inside(point, this%trans%poly%array(n))) THEN ! stop at the first matching polygon
2688  this%outnx = this%outnx + 1
2689  this%point_index(i,1) = n
2690  EXIT
2691  ENDIF
2692  ENDDO
2693 ! CALL delete(point) ! speedup
2694  ENDDO
2695 
2696  IF (this%outnx <= 0) THEN
2697  CALL l4f_category_log(this%category,l4f_warn, &
2698  "metamorphosis:poly: no points inside polygons")
2699  ENDIF
2700 

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