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C Copyright 1981-2007 ECMWF
C
C Licensed under the GNU Lesser General Public License which
C incorporates the terms and conditions of version 3 of the GNU
C General Public License.
C See LICENSE and gpl-3.0.txt for details.
C
INTEGER FUNCTION IGPLSM (POFELD, KLEN, KPR, KERR)
C
C---->
C**** *IGPLSM*
C
C PURPOSE
C _______
C
C Force an interpolated land sea mask field back to a real 0-1
C field.
C
C INTERFACE
C _________
C
C IERR = IGPLSM (POFELD, KLEN, KPR, KERR)
C
C Input parameters
C ________________
C
C POFELD - The output field as previously calculated.
C
C KLEN - The length of the output field.
C
C KPR - The debug print switch.
C 0 , No debugging output.
C 1 , Produce debugging output.
C
C KERR - The error control flag.
C -ve, No error message. Return error code.
C 0 , Hard failure with error message.
C +ve, Print error message. Return error code.
C
C Output parameters
C ________________
C
C POFELD - The 0-1 land sea mask output field
C
C Return value
C ____________
C
C The error indicator (INTEGER).
C
C Error and Warning Return Values
C _______________________________
C
C None
C
C Common block usage
C __________________
C
C None
C
C EXTERNALS
C _________
C
C INTLOG(R) - Logs messages.
C
C METHOD
C ______
C
C The intrinsic routine ANINT is used to create a real array of
C the nearest integer value to the interpolated field. An
C additional check is that all values less than zero are forced
C to zero and all values greater than one are forced to one.
C
C REFERENCE
C _________
C
C None
C
C COMMENTS
C ________
C
C Program contains sections 0 to 2 and 9
C
C AUTHOR
C ______
C
C K. Fielding *ECMWF* Feb 1994
C
C MODIFICATIONS
C _____________
C
C None
C
C----<
C _______________________________________________________
C
C
C* Section 0. Definition of variables.
C _______________________________________________________
C
C* Prefix conventions for variable names
C
C Logical L (but not LP), global or common.
C O, dummy argument
C G, local variable
C LP, parameter.
C Character C, global or common.
C H, dummy argument
C Y (but not YP), local variable
C YP, parameter.
C Integer M and N, global or common.
C K, dummy argument
C I, local variable
C J (but not JP), loop control
C JP, parameter.
C REAL A to F and Q to X, global or common.
C P (but not PP), dummy argument
C Z, local variable
C PP, parameter.
C
C Implicit statement to force declarations
C
IMPLICIT NONE
C
#include "parim.h"
C
C Dummy arguments
INTEGER KLEN, KPR, KERR
REAL POFELD (KLEN)
C
C Local variables
INTEGER JLEN
INTEGER JPROUTINE
PARAMETER (JPROUTINE = 25700)
C
C _______________________________________________________
C
C* Section 1. Initialisation
C _______________________________________________________
C
100 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IGPLSM: Section 1.',JPQUIET)
C
IGPLSM = 0
C
IF (KPR .GE. 1)
X CALL INTLOG(JP_DEBUG,'IGPLSM: Total fld len = ',KLEN)
C
C
C _______________________________________________________
C
C* Section 2. Force land sea mask to nearest integer (0 or 1)
C _______________________________________________________
C
200 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IGPLSM: Section 2.',JPQUIET)
C
DO 210 JLEN = 1, KLEN
C
POFELD (JLEN) = ANINT (POFELD (JLEN) )
C
IF (POFELD (JLEN) .LT. PPZERO) POFELD (JLEN) = PPZERO
IF (POFELD (JLEN) .GT. PPONE) POFELD (JLEN) = PPONE
C
210 CONTINUE
C
C _______________________________________________________
C
C* Section 9. Return to calling routine. Format statements
C _______________________________________________________
C
900 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IGPLSM: Section 9.',JPQUIET)
C
RETURN
END
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