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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 IAOGDEF (PWEST, PEAST, PNORTH, PSOUTH,
1 KGAUSS, KAREA, OCHNG, OIWEGLOBE, OINPOLE, OISPOLE,
2 KIAREA, KPR, KERR)
C
C---->
C**** *IAOGDEF*
C
C PURPOSE
C _______
C
C Set the output field definition variables.
C
C INTERFACE
C _________
C
C IERR = IAOGDEF (PWEST, PEAST, PNORTH, PSOUTH, KGAUSS, KAREA,
C 1 OCHNG, OIWEGLOBE, OINPOLE, OISPOLE, KIAREA, KPR, KERR)
C
C Input parameters
C ________________
C
C PWEST - The Western limit of the output field area.
C
C PEAST - The Eastern limit of the output field area.
C
C PNORTH - The Northern limit of the output field area.
C
C PSOUTH - The Southern limit of the output field area.
C
C KGAUSS - The Gaussian truncation for the output field.
C
C KAREA - The previous output field area used for checking
C for definition changes.
C
C OIWEGLOBE - Flag indicating whether the INPUT field spans the
C globe in the West-East direction.
C
C OINPOLE - Flag indicating whether the INPUT field includes
C the North polar line of latitude.
C
C OISPOLE - Flag indicating whether the INPUT field includes
C the South polar line of latitude.
C
C KIAREA - The input field area which will be used for an
C uninitialised output field area when the input
C field is not global.
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 KAREA - The output field area if the definition has changed.
C
C OCHNG - A flag variable indicating whether the definition
C has changed.
C
C Return value
C ____________
C
C The error indicator (INTEGER).
C
C Error and Warning Return Values
C _______________________________
C
C 21601 An illegal Gaussian truncation was requested.
C 21602 The default West-East output limits for a non-global
C input field did not match the increment.
C 21603 Default North-South limits were specified for a
C non-global input field. This is not allowed for a
C Gaussian output field.
C
C Common block usage
C __________________
C
C nofld.common - This file contains all the output field
C definition variables.
C
C NOGAUSS - Output field Gaussian truncation is set.
C NOREPR - Output field representation is set.
C NOSCNM - Output field scanning mode is set.
C
C EXTERNALS
C _________
C
C INTLOG - Logs messages.
C
C METHOD
C ______
C
C Check the output definition against the previous definition and
C update appropriate definition variables.
C
C REFERENCE
C _________
C
C None
C
C COMMENTS
C ________
C
C Program contains sections 0 to 3 and 9
C
C AUTHOR
C ______
C
C K. Fielding *ECMWF* Apr 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"
#include "nofld.common"
C
C Subroutine arguments
C
LOGICAL OCHNG, OIWEGLOBE, OINPOLE, OISPOLE
INTEGER KGAUSS, KPR, KERR
INTEGER KAREA (4), KIAREA (4)
REAL PWEST, PEAST, PNORTH, PSOUTH
C
C Local variables
LOGICAL GLOBE, GNS
INTEGER INORTH, ISOUTH, IWEST, IEAST, IWEINC, IWETMP, ITEMP
INTEGER IERR
INTEGER JPROUTINE
PARAMETER (JPROUTINE = 21600)
C
C External functions
C
C Transform definition variables that must be preserved
C
C
C _______________________________________________________
C
C* Section 1. Initialisation
C _______________________________________________________
C
100 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IAOGDEF: Section 1.',JPQUIET)
C
IAOGDEF = 0
C
IERR = 0
C
OCHNG = .FALSE.
C
GNS = OINPOLE .AND. OISPOLE
C
GLOBE = OIWEGLOBE .AND. GNS
C
IF (KPR .GE. 1) THEN
CALL INTLOG(JP_DEBUG,'IAOGDEF: Input parameters',JPQUIET)
CALL INTLOG(JP_DEBUG,'IAOGDEF: Gaussian truncation = ',KGAUSS)
CALL INTLOGR(JP_DEBUG,'IAOGDEF: Area North = ',PNORTH)
CALL INTLOGR(JP_DEBUG,'IAOGDEF: Area West = ',PWEST)
CALL INTLOGR(JP_DEBUG,'IAOGDEF: Area South = ',PSOUTH)
CALL INTLOGR(JP_DEBUG,'IAOGDEF: Area East = ',PEAST)
ENDIF
C
C _______________________________________________________
C
C
C* Section 2. Convert parameters to integer
C _______________________________________________________
C
200 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IAOGDEF: Section 2.',JPQUIET)
C
C Representation
C
IF (NOREPR .NE. JPGAUSSIAN) THEN
NOREPR = JPGAUSSIAN
OCHNG = .TRUE.
ENDIF
C
NOSCNM = 0
C
C North, South, West and East limits
C
INORTH = NINT (PNORTH * PPMULT)
ISOUTH = NINT (PSOUTH * PPMULT)
IWEST = NINT (PWEST * PPMULT)
IEAST = NINT (PEAST * PPMULT)
C
C Direction increments for regular grids
C
IWEINC = JP90 / KGAUSS
C
IF (IWEINC * KGAUSS .NE. JP90) THEN
IAOGDEF = JPROUTINE + 1
IF (KERR .GE. 0) THEN
CALL INTLOG(JP_ERROR,
X 'IAOGDEF: Illegal gaussian truncation = ',KGAUSS)
IF (KERR .EQ. 0) CALL INTLOG(JP_FATAL,
X 'IAOGDEF: Interpolation failing.',JPQUIET)
ENDIF
GO TO 900
ENDIF
C
C
C _______________________________________________________
C
C
C* Section 3. Adjust grid stride and area
C _______________________________________________________
C
300 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IAOGDEF: Section 3.',JPQUIET)
C
C Global field if all area limits are 0
C
IF (INORTH .EQ. 0 .AND. ISOUTH .EQ. 0 .AND.
X IWEST .EQ. 0 .AND. IEAST .EQ. 0) THEN
C
INORTH = JP90
ISOUTH = - JP90
C
IF (GLOBE) THEN
C
IWEST = 0
IEAST = JP360 - IWEINC
C
ELSE
IF (GNS) THEN
C
IWEST = KIAREA (JPWEST)
IEAST = KIAREA (JPEAST)
C
IF (MOD (IEAST - IWEST, IWEINC) .NE. 0) THEN
IAOGDEF = JPROUTINE + 2
IF (KERR .GE. 0) THEN
CALL INTLOG(JP_ERROR,
X 'IAOGDEF: West-East increment ', IWEINC)
CALL INTLOG(JP_ERROR,
X 'IAOGDEF: does not match the range from ',IWEST)
CALL INTLOG(JP_ERROR,
X 'IAOGDEF: to ',IEAST)
IF (KERR .EQ. 0) CALL INTLOG(JP_FATAL,
X 'IAOGDEF: Interpolation failing.',JPQUIET)
ENDIF
GO TO 900
ENDIF
ELSE
IAOGDEF = JPROUTINE + 3
IF (KERR .GE. 0) THEN
CALL INTLOG(JP_ERROR,
X 'IAOGDEF: Must specify a range if Gaussian',JPQUIET)
CALL INTLOG(JP_ERROR,
X 'IAOGDEF: output and non-global input.',JPQUIET)
IF (KERR .EQ. 0) CALL INTLOG(JP_FATAL,
X 'IAOGDEF: Interpolation failing.',JPQUIET)
ENDIF
GO TO 900
ENDIF
ENDIF
C
ELSE
C
C Try to produce fields representable in GRIB for 0.5625 degree
C strides
C
IF (IEAST .LT. IWEST) THEN
IF (IEAST .LE. 0) THEN
IEAST = IEAST + JP360
ELSE
IWEST = IWEST - JP360
ENDIF
ENDIF
C
GLOBE = IEAST - IWEST + IWEINC .EQ. JP360 .OR.
X IEAST - IWEST + IWEINC .EQ. 0
C
IF (MOD (IWEINC, 10) .EQ. 5 .AND. .NOT. GLOBE) THEN
IWETMP = IWEINC * 2
ELSE
IWETMP = IWEINC
ENDIF
C
IF (MOD (IEAST - IWEST, IWETMP) .NE. 0) THEN
C
IF (MOD (IEAST, IWETMP) .NE. 0) THEN
C
ITEMP = ABS (IEAST) / IWETMP
C
IF (IEAST .GT. 0) THEN
IEAST = (ITEMP + 1) * IWETMP
IF (IEAST .GT. JP360) IEAST = IEAST - IWETMP
ELSE
IEAST = - ITEMP * IWETMP
ENDIF
ENDIF
C
IF (MOD (IWEST, IWETMP) .NE. 0) THEN
C
ITEMP = ABS (IWEST) / IWETMP
C
IF (IWEST .LT. 0) THEN
IWEST = - (ITEMP + 1) * IWETMP
IF (IWEST .LT. - JP360) IWEST = IWEST + IWETMP
ELSE
IWEST = ITEMP * IWETMP
ENDIF
ENDIF
ENDIF
ENDIF
C
IF (NOGAUSS .NE. KGAUSS) THEN
NOGAUSS = KGAUSS
OCHNG = .TRUE.
ENDIF
C
IF (KAREA (JPNORTH) .NE. INORTH) THEN
KAREA (JPNORTH) = INORTH
OCHNG = .TRUE.
ENDIF
C
IF (KAREA (JPSOUTH) .NE. ISOUTH) THEN
KAREA (JPSOUTH) = ISOUTH
OCHNG = .TRUE.
ENDIF
C
IF (IWEST .NE. KAREA (JPWEST) ) THEN
KAREA (JPWEST) = IWEST
OCHNG = .TRUE.
ENDIF
C
IF (IEAST .NE. KAREA (JPEAST) ) THEN
KAREA (JPEAST) = IEAST
OCHNG = .TRUE.
ENDIF
C
IF (KPR .GE. 1) THEN
CALL INTLOG(JP_DEBUG,
X 'IAOGDEF: Output field definition parameters.',JPQUIET)
CALL INTLOG(JP_DEBUG,
X 'IAOGDEF: Representation is ',NOREPR)
CALL INTLOG(JP_DEBUG,
X 'IAOGDEF: Gaussian truncation is ',NOGAUSS)
CALL INTLOG(JP_DEBUG,
X 'IAOGDEF: Area North is ',KAREA(1))
CALL INTLOG(JP_DEBUG,
X 'IAOGDEF: Area West is ',KAREA(2))
CALL INTLOG(JP_DEBUG,
X 'IAOGDEF: Area South is ',KAREA(3))
CALL INTLOG(JP_DEBUG,
X 'IAOGDEF: Area East is ',KAREA(4))
IF( OCHNG ) THEN
CALL INTLOG(JP_DEBUG,
X 'IAOGDEF: Output field change is TRUE.',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,
X 'IAOGDEF: Output field change is TRUE.',JPQUIET)
ENDIF
C
ENDIF
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,'IAOGDEF: Section 9.',JPQUIET)
C
RETURN
END
|
