!> @file tests/test-interpolation.f90 !------------------------------------------------------------------------------! ! This file is part of the PALM model system. ! ! PALM is free software: you can redistribute it and/or modify it under the ! terms of the GNU General Public License as published by the Free Software ! Foundation, either version 3 of the License, or (at your option) any later ! version. ! ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. ! ! You should have received a copy of the GNU General Public License along with ! PALM. If not, see . ! ! Copyright 2017-2018 Leibniz Universitaet Hannover ! Copyright 2017-2018 Deutscher Wetterdienst Offenbach !------------------------------------------------------------------------------! ! ! Current revisions: ! ----------------- ! ! ! Former revisions: ! ----------------- ! $Id: test-interpolation.f90 2718 2018-01-02 08:49:38Z scharf $ ! Initial revision ! ! ! ! Authors: ! -------- ! @author Eckhard Kadasch ! ! Description: ! ------------ !> This program tests INIFOR's horizontal interpolation. !------------------------------------------------------------------------------! PROGRAM test_interpolation USE grid, & ONLY: grid_definition, init_grid_definition, TO_RADIANS, TO_DEGREES, & linspace, hhl USE transform, & ONLY: find_horizontal_neighbours, compute_horizontal_interp_weights USE test_utils IMPLICIT NONE ! !------------------------------------------------------------------------------ !- Test 1: Find neighbours !------------------------------------------------------------------------------ CHARACTER(LEN=30) :: title = "find neighbours" LOGICAL :: res TYPE(grid_definition) :: palm_grid, cosmo_grid INTEGER :: i, j, ii_ref(0:1, 0:1, 4), jj_ref(0:1, 0:1, 4) INTEGER, PARAMETER :: nlon=3, nlat=3, nlev=2 REAL :: w_ref(4), lat(0:2), lon(0:2) title = "find neighbours" CALL begin_test(title, res) ! Arange. ! Make a COSMO-DE grid with just two horizotal cells/three h. points PRINT *, "INIT GRID" ! Allocate grid.hhl for use in init_grid_definition. In INIFOR, this is done ! in get_netcdf_variable_2d. In this test, grid.hhl is not used and only ! defined manually because it is used in init_grid_definition. ALLOCATE (hhl (nlon, nlat, nlev) ) hhl(:,:,:) = 0.0 CALL init_grid_definition('cosmo-de', grid = cosmo_grid, & xmin = -5.0 * TO_RADIANS, xmax = 5.5 * TO_RADIANS, & ymin = -5.0 * TO_RADIANS, ymax = 6.5 * TO_RADIANS, & zmin = 0.0, zmax = 10.0, & x0 = 0.0, y0 = 0.0, z0 = 0.0, & nx = nlon-1, ny = nlat-1, nz = nlev-1) PRINT *, "GRID DONE" PRINT *, "COSMO lats: ", cosmo_grid % lat * TO_DEGREES PRINT *, "COSMO lons: ", cosmo_grid % lon * TO_DEGREES res = assert_equal( (/cosmo_grid%lat(0), cosmo_grid % lon(0), & cosmo_grid%lat(2), cosmo_grid % lon(2), & cosmo_grid%dx*TO_DEGREES, cosmo_grid%dy*TO_DEGREES/),& (/-5.0 * TO_RADIANS, -5.0 * TO_RADIANS, & 6.5 * TO_RADIANS, 5.5 * TO_RADIANS, & 5.25, 5.75 /), & "COSMO grid coordinates" ) ! Define a PALM-4U grid with only one cell, i.e. four points in the ! horizontal plane. The points are located at the centres of ! the COSMO-DE cells. CALL init_grid_definition('palm intermediate', grid = palm_grid, & xmin = 0.0, xmax = 1.0, & ymin = 0.0, ymax = 1.0, & zmin = 0.0, zmax = 1.0, & x0 = 0.0, y0 = 0.0, z0 = 0.0, & nx = 1, ny = 1, nz = 1) palm_grid % clon(0,0) = 0.5 * cosmo_grid % lon(0) palm_grid % clat(0,0) = 0.5 * cosmo_grid % lat(0) palm_grid % clon(0,1) = 0.5 * cosmo_grid % lon(0) palm_grid % clat(0,1) = 0.5 * cosmo_grid % lat(2) palm_grid % clon(1,1) = 0.5 * cosmo_grid % lon(2) palm_grid % clat(1,1) = 0.5 * cosmo_grid % lat(2) palm_grid % clon(1,0) = 0.5 * cosmo_grid % lon(2) palm_grid % clat(1,0) = 0.5 * cosmo_grid % lat(0) ii_ref(0,0,:) = (/0, 0, 1, 1/) jj_ref(0,0,:) = (/0, 1, 1, 0/) ii_ref(0,1,:) = (/0, 0, 1, 1/) jj_ref(0,1,:) = (/1, 2, 2, 1/) ii_ref(1,1,:) = (/1, 1, 2, 2/) jj_ref(1,1,:) = (/1, 2, 2, 1/) ii_ref(1,0,:) = (/1, 1, 2, 2/) jj_ref(1,0,:) = (/0, 1, 1, 0/) ! Act CALL find_horizontal_neighbours(cosmo_grid % lat, cosmo_grid % lon, & cosmo_grid % dxi, cosmo_grid % dyi, palm_grid % clat, palm_grid % clon, & palm_grid % ii, palm_grid % jj) ! Assert DO j = 0, 1 DO i = 0, 1 res = res .AND. ALL(palm_grid%ii(i,j,:) == ii_ref(i,j,:)) PRINT *, "ii : ", palm_grid%ii(i,j,:) PRINT *, "ii_ref : ", ii_ref(i,j,:), " indices match? ", res res = res .AND. ALL(palm_grid%jj(i,j,:) == jj_ref(i,j,:)) PRINT *, "jj : ", palm_grid%jj(i,j,:) PRINT *, "jj_ref : ", jj_ref(i,j,:), " indices match? ", res END DO END DO CALL end_test(title, res) ! !------------------------------------------------------------------------------ !- Test 2: Compute weights for linear interpolation !------------------------------------------------------------------------------ title = "interpolation weights" CALL begin_test(title, res) ! Arange ! defining some shorthands lon(:) = cosmo_grid % lon(:) lat(:) = cosmo_grid % lat(:) ! set up PALM-4U points at 1/4 and 1/3 of the COSMO grid widths palm_grid % clon(0,0) = -0.25 * (lon(1) - lon(0)) + lon(1) palm_grid % clat(0,0) = -2./3. * (lat(1) - lat(0)) + lat(1) palm_grid % clon(0,1) = -2./3. * (lon(1) - lon(0)) + lon(1) palm_grid % clat(0,1) = +0.25 * (lat(2) - lat(1)) + lat(1) palm_grid % clon(1,1) = +0.25 * (lon(2) - lon(1)) + lon(1) palm_grid % clat(1,1) = +2./3. * (lat(2) - lat(1)) + lat(1) palm_grid % clon(1,0) = +2./3. * (lon(2) - lon(1)) + lon(1) palm_grid % clat(1,0) = -0.25 * (lat(1) - lat(0)) + lat(1) DO j = 0, 1 DO i = 0, 1 PRINT *, "PALM lon, lat: ", palm_grid % clon(i,j) * TO_DEGREES, palm_grid % clat(i,j)*TO_DEGREES END DO END DO ! Act CALL find_horizontal_neighbours(cosmo_grid % lat, cosmo_grid % lon, & cosmo_grid % dxi, cosmo_grid % dyi, palm_grid % clat, palm_grid % clon, & palm_grid % ii, palm_grid % jj) CALL compute_horizontal_interp_weights(cosmo_grid % lat, cosmo_grid % lon, & cosmo_grid % dxi, cosmo_grid % dyi, palm_grid % clat, & palm_grid % clon, palm_grid % ii, palm_grid % jj, palm_grid % w_horiz) ! Assert ! asserting that neighbours are still correct DO j = 0, 1 DO i = 0, 1 res = res .AND. ALL(palm_grid%ii(i,j,:) == ii_ref(i,j,:)) PRINT *, "ii : ", palm_grid%ii(i,j,:) PRINT *, "ii_ref : ", ii_ref(i,j,:), " indices match? ", res res = res .AND. ALL(palm_grid%jj(i,j,:) == jj_ref(i,j,:)) PRINT *, "jj : ", palm_grid%jj(i,j,:) PRINT *, "jj_ref : ", jj_ref(i,j,:), " indices match? ", res END DO END DO ! asserting that all four weights equal, 0.5, 0.25, 1./6., and 1./12., resp. w_ref = (/1./6., 1./12., 0.25, 0.5/) res = res .AND. assert_equal(palm_grid % w_horiz(0, 0, :), w_ref(:), "weights at (0,0)") !res = res .AND. palm_grid % w_horiz(0, 0, 1) == w_ref(1) !res = res .AND. palm_grid % w_horiz(0, 0, 2) == w_ref(2) !res = res .AND. palm_grid % w_horiz(0, 0, 3) == w_ref(3) !res = res .AND. palm_grid % w_horiz(0, 0, 4) == w_ref(4) w_ref = (/0.5, 1./6., 1./12., 0.25/) res = res .AND. assert_equal(palm_grid % w_horiz(0, 1, :), w_ref(:), "weights at (0,1)") !res = res .AND. palm_grid % w_horiz(0, 1, 1) == w_ref(4) !res = res .AND. palm_grid % w_horiz(0, 1, 2) == w_ref(1) !res = res .AND. palm_grid % w_horiz(0, 1, 3) == w_ref(2) !res = res .AND. palm_grid % w_horiz(0, 1, 4) == w_ref(3) w_ref = (/0.25, 0.5, 1./6., 1./12./) res = res .AND. assert_equal(palm_grid % w_horiz(1, 1, :), w_ref(:), "weights at (1,1)") !res = res .AND. palm_grid % w_horiz(1, 1, 1) == w_ref(3) !res = res .AND. palm_grid % w_horiz(1, 1, 2) == w_ref(4) !res = res .AND. palm_grid % w_horiz(1, 1, 3) == w_ref(1) !res = res .AND. palm_grid % w_horiz(1, 1, 4) == w_ref(2) w_ref = (/1./12., 0.25, 0.5, 1./6./) res = res .AND. assert_equal(palm_grid % w_horiz(1, 0, :), w_ref(:), "weights at (1,0)") !res = res .AND. palm_grid % w_horiz(1, 0, 1) == w_ref(2) !res = res .AND. palm_grid % w_horiz(1, 0, 2) == w_ref(3) !res = res .AND. palm_grid % w_horiz(1, 0, 3) == w_ref(4) !res = res .AND. palm_grid % w_horiz(1, 0, 4) == w_ref(1) CALL end_test(title, res) END PROGRAM test_interpolation