* * zaxreplace_lin.F * * This software was developed by the Thermal Modeling and Analysis * Project(TMAP) of the National Oceanographic and Atmospheric * Administration's (NOAA) Pacific Marine Environmental Lab(PMEL), * hereafter referred to as NOAA/PMEL/TMAP. * * Access and use of this software shall impose the following * obligations and understandings on the user. The user is granted the * right, without any fee or cost, to use, copy, modify, alter, enhance * and distribute this software, and any derivative works thereof, and * its supporting documentation for any purpose whatsoever, provided * that this entire notice appears in all copies of the software, * derivative works and supporting documentation. Further, the user * agrees to credit NOAA/PMEL/TMAP in any publications that result from * the use of this software or in any product that includes this * software. The names TMAP, NOAA and/or PMEL, however, may not be used * in any advertising or publicity to endorse or promote any products * or commercial entity unless specific written permission is obtained * from NOAA/PMEL/TMAP. The user also understands that NOAA/PMEL/TMAP * is not obligated to provide the user with any support, consulting, * training or assistance of any kind with regard to the use, operation * and performance of this software nor to provide the user with any * updates, revisions, new versions or "bug fixes". * * THIS SOFTWARE IS PROVIDED BY NOAA/PMEL/TMAP "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL NOAA/PMEL/TMAP BE LIABLE FOR ANY SPECIAL, * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF * CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE. * * Ansley Manke * august 2004 * * V580:10/04 *acm* Fix for bug 1037. Before the loop calling hunt_r4, * set the initial guess for nsrc_lo to 1 not 0. * * Replace Z axis, using linear interpolation * (same as zaxreplace, as first step towards zaxreplace_zlev) * * * In this subroutine we provide information about * the function. The user configurable information * consists of the following: * * descr Text description of the function * * num_args Required number of arguments * * axis_inheritance Type of axis for the result * ( CUSTOM, IMPLIED_BY_ARGS, NORMAL, ABSTRACT ) * CUSTOM - user defined axis * IMPLIED_BY_ARGS - same axis as the incoming argument * NORMAL - the result is normal to this axis * ABSTRACT - an axis which only has index values * * piecemeal_ok For memory optimization: * axes where calculation may be performed piecemeal * ( YES, NO ) * * * For each argument we provide the following information: * * name Text name for an argument * * unit Text units for an argument * * desc Text description of an argument * * axis_influence Are this argument's axes the same as the result grid? * ( YES, NO ) * * axis_extend How much does Ferret need to extend arg limits relative to result * SUBROUTINE zaxreplace_lin_init(id) INCLUDE 'ferret_cmn/EF_Util.cmn' INTEGER id, arg *********************************************************************** * USER CONFIGURABLE PORTION | * | * V CHARACTER*100 descr CALL ef_set_desc(id, . 'regrid V onto Z axis of ZAX based on layer thickness ') CALL ef_set_num_args(id, 3) CALL ef_set_has_vari_args(id, NO) CALL ef_set_axis_inheritance(id, IMPLIED_BY_ARGS, . IMPLIED_BY_ARGS, IMPLIED_BY_ARGS, IMPLIED_BY_ARGS) CALL ef_set_piecemeal_ok(id, YES, YES, YES, NO) arg = 1 CALL ef_set_arg_name(id, arg, 'V') CALL ef_set_arg_desc(id, arg, . 'Variable on native z axis') CALL ef_set_axis_influence(id, arg, YES, YES, NO, YES) arg = 2 CALL ef_set_arg_name(id, arg, 'THICKNESS') WRITE (descr, 20) 20 FORMAT ('Thickness corresponding to input Z axis values ', . 'in units of output Z axis') CALL ef_set_arg_desc(id, arg, descr) CALL ef_set_axis_influence(id, arg, NO, NO, NO, NO) arg = 3 CALL ef_set_arg_name(id, arg, 'ZAX') CALL ef_set_arg_desc(id, arg, .'Variable with desired z (depth) axis points') CALL ef_set_axis_influence(id, arg, NO, NO, YES, NO) * ^ * | * USER CONFIGURABLE PORTION | *********************************************************************** RETURN END * * In this subroutine we compute the result * SUBROUTINE zaxreplace_lin_compute(id, arg_1, arg_2, arg_3, result) INCLUDE 'ferret_cmn/EF_Util.cmn' INCLUDE 'ferret_cmn/EF_mem_subsc.cmn' INTEGER id REAL bad_flag(EF_MAX_ARGS), bad_flag_result REAL arg_1(mem1lox:mem1hix, mem1loy:mem1hiy, mem1loz:mem1hiz, . mem1lot:mem1hit) REAL arg_2(mem2lox:mem2hix, mem2loy:mem2hiy, mem2loz:mem2hiz, . mem2lot:mem2hit) REAL arg_3(mem3lox:mem3hix, mem3loy:mem3hiy, mem3loz:mem3hiz, . mem3lot:mem3hit) REAL result(memreslox:memreshix, memresloy:memreshiy, . memresloz:memreshiz, memreslot:memreshit) * After initialization, the 'res_' arrays contain indexing information * for the result axes. The 'arg_' arrays will contain the indexing * information for each variable's axes. INTEGER res_lo_ss(4), res_hi_ss(4), res_incr(4) INTEGER arg_lo_ss(4,EF_MAX_ARGS), arg_hi_ss(4,EF_MAX_ARGS), . arg_incr(4,EF_MAX_ARGS) *********************************************************************** * USER CONFIGURABLE PORTION | * | * V INTEGER i, j, k, l INTEGER i1, j1, l1, i2, j2, l2, i3, j3, l3 INTEGER nsrc_lo, klo, khi REAL frac, zval CALL ef_get_res_subscripts(id, res_lo_ss, res_hi_ss, res_incr) CALL ef_get_arg_subscripts(id, arg_lo_ss, arg_hi_ss, arg_incr) CALL ef_get_bad_flags(id, bad_flag, bad_flag_result) * * Loop over x,y,t of the input fields * klo = arg_lo_ss(Z_AXIS, ARG2) khi = arg_hi_ss(Z_AXIS, ARG2) i1 = arg_lo_ss(X_AXIS,ARG1) i2 = arg_lo_ss(X_AXIS,ARG2) i3 = arg_lo_ss(X_AXIS,ARG3) DO 400 i=res_lo_ss(X_AXIS), res_hi_ss(X_AXIS) j1 = arg_lo_ss(Y_AXIS,ARG1) j2 = arg_lo_ss(Y_AXIS,ARG2) j3 = arg_lo_ss(Y_AXIS,ARG3) DO 300 j=res_lo_ss(Y_AXIS), res_hi_ss(Y_AXIS) l1 = arg_lo_ss(T_AXIS,ARG1) l2 = arg_lo_ss(T_AXIS,ARG2) l3 = arg_lo_ss(T_AXIS,ARG3) DO 200 l=res_lo_ss(T_AXIS), res_hi_ss(T_AXIS) * --- first set this to do regular linear interpolation, as in zaxreplace, * and check that it replicates the behavior of zaxreplace. Then * deal with layer thicknesses. * For each z line interpolate. nsrc_lo = 0 nsrc_lo = 1 ! fixes bug where if zval equals 1st point in axis ! we got no match. DO 100 k = res_lo_ss(Z_AXIS), res_hi_ss(Z_AXIS) * ... next Z axis value (arg3) to locate zval = arg_3(i3,j3,k,l3) * ... search the Z field (arg_2) for the index just below this value * ... note that nsrc_lo is always referenced to a starting index of 1 CALL HUNT_R4(arg_2, 1, khi, zval, nsrc_lo, frac) * ... interpolate data arg_1 field to get result IF ( frac .LT. 0.0 ) THEN * ... no luck -- the Z axis value we seek is outside the range in com2 result(i,j,k,l) = bad_flag_result ELSEIF ( arg_1(i1,j1,nsrc_lo,l1) .EQ. . bad_flag(ARG1) ) THEN result(i,j,k,l) = bad_flag_result ELSEIF ( frac .EQ. 1.0 ) THEN ! exactly on point result(i,j,k,l) = arg_1(i1,j1,nsrc_lo,l1) ELSE result(i,j,k,l) = frac* arg_1(i1,j1,nsrc_lo,l1) . + (1-frac)* arg_1(i1,j1,nsrc_lo+1,l1) ENDIF 100 CONTINUE l1 = l1 + arg_incr(T_AXIS,ARG1) l2 = l2 + arg_incr(T_AXIS,ARG2) l3 = l3 + arg_incr(T_AXIS,ARG3) 200 CONTINUE j1 = j1 + arg_incr(Y_AXIS,ARG1) j2 = j2 + arg_incr(Y_AXIS,ARG2) j3 = j3 + arg_incr(Y_AXIS,ARG3) 300 CONTINUE i1 = i1 + arg_incr(X_AXIS,ARG1) i2 = i2 + arg_incr(X_AXIS,ARG2) i3 = i3 + arg_incr(X_AXIS,ARG3) 400 CONTINUE * ^ * | * USER CONFIGURABLE PORTION | *********************************************************************** RETURN END SUBROUTINE HUNT_R4 (x1,lo_dim,hi_dim,x2,ndx_lo, frac) * * * This software was developed by the Thermal Modeling and Analysis * Project(TMAP) of the National Oceanographic and Atmospheric * Administration's (NOAA) Pacific Marine Environmental Lab(PMEL), * hereafter referred to as NOAA/PMEL/TMAP. * * Access and use of this software shall impose the following * obligations and understandings on the user. The user is granted the * right, without any fee or cost, to use, copy, modify, alter, enhance * and distribute this software, and any derivative works thereof, and * its supporting documentation for any purpose whatsoever, provided * that this entire notice appears in all copies of the software, * derivative works and supporting documentation. Further, the user * agrees to credit NOAA/PMEL/TMAP in any publications that result from * the use of this software or in any product that includes this * software. The names TMAP, NOAA and/or PMEL, however, may not be used * in any advertising or publicity to endorse or promote any products * or commercial entity unless specific written permission is obtained * from NOAA/PMEL/TMAP. The user also understands that NOAA/PMEL/TMAP * is not obligated to provide the user with any support, consulting, * training or assistance of any kind with regard to the use, operation * and performance of this software nor to provide the user with any * updates, revisions, new versions or "bug fixes". * * THIS SOFTWARE IS PROVIDED BY NOAA/PMEL/TMAP "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL NOAA/PMEL/TMAP BE LIABLE FOR ANY SPECIAL, * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF * CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE. * * * Routine to determine nearest neighbor index (lower index) * on GRID1 for points on GRID2. * Taken from Numerical Recipes, Chapter 3, Section "Search With * Correlated Values" * V450: 7/97 - new, cloned from double prec. version hunt.F * - also return "frac" - the interpolation factor for ndx_lo integer lo_dim,hi_dim,ndx_lo,ndx_mid,ndx_hi,inc real x1(lo_dim:hi_dim),x2, frac logical ascnd ******************************************************************************** * TRUE IF ASCENDING GRID COORDINATES, FALSE OTHERWISE ascnd = x1(hi_dim) .gt. x1(lo_dim) * IF INITIAL GUESS IS NO GOOD, GO IMMEDIATELY TO BISECTION if (ndx_lo .lt. lo_dim .or. ndx_lo .gt. hi_dim) then ndx_lo = lo_dim - 1 ndx_hi = hi_dim + 1 goto 3 end if inc = 1 * QUICKLY GET A GOOD ESTIMATE FOR LOCATION IN GRID1 if (x2 .ge. x1(ndx_lo) .eqv. ascnd) then * HUNT UP FOR PLACEMENT IN GRID 1 ndx_hi = ndx_lo + inc if (ndx_hi .gt. hi_dim) then * HUNT OVER -- OFF HIGH END OF GRID ndx_hi = hi_dim + 1 ! else if (x2 .ge. x1(ndx_hi) .eqv. ascnd) then (ORIGINAL CODE) else if (x2 .gt. x1(ndx_hi) .eqv. ascnd) then ndx_lo = ndx_hi inc = inc + inc goto 1 end if else * HUNT DOWN FOR PLACEMENT ndx_hi = ndx_lo 2 ndx_lo = ndx_hi - inc if (ndx_lo .lt. lo_dim) then * FALL OFF LOW END OF GRID -- HUNT IS OVER ndx_lo = lo_dim - 1 else if (x2 .lt. x1(ndx_lo) .eqv. ascnd) then ndx_hi = ndx_lo inc = inc + inc goto 2 end if end if * USE BISECTION TO DETERMINE EXACT LOCATION IN GRID 3 IF (ndx_hi - ndx_lo .eq. 1) THEN * return result -- including interpolation fraction IF (ndx_lo.GE.lo_dim .AND. ndx_lo.LT.hi_dim) THEN IF (x2 .EQ. x1(ndx_lo)) THEN frac = 1.0 ELSE frac = (x1(ndx_hi)-x2) / (x1(ndx_hi)-x1(ndx_lo)) ENDIF ELSE frac = -999.0 ENDIF return ENDIF ndx_mid = (ndx_hi + ndx_lo)/2 if (x2 .gt. x1(ndx_mid) .eqv. ascnd) then ndx_lo = ndx_mid else ndx_hi = ndx_mid end if goto 3 end