diff --git a/src/MNH/position_tools.f90 b/src/MNH/position_tools.f90
new file mode 100644
index 0000000000000000000000000000000000000000..2fb03e7d5ce4366b0d794f72ddfd0a1b163cd085
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+++ b/src/MNH/position_tools.f90
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+!MNH_LIC Copyright 2022-2022 CNRS, Meteo-France and Universite Paul Sabatier
+!MNH_LIC This is part of the Meso-NH software governed by the CeCILL-C licence
+!MNH_LIC version 1. See LICENSE, CeCILL-C_V1-en.txt and CeCILL-C_V1-fr.txt
+!MNH_LIC for details. version 1.
+!-----------------------------------------------------------------
+! Author:
+!  P. Wautelet 25/11/2022
+! Modifications:
+!-----------------------------------------------------------------
+!      ###################
+MODULE MODE_POSITION_TOOLS
+!      ###################
+
+USE MODE_MSG
+
+IMPLICIT NONE
+
+PRIVATE
+
+PUBLIC :: FIND_PROCESS_AND_MODEL_FROM_XY_POS
+
+CONTAINS
+
+!----------------------------------------------------------------------------
+SUBROUTINE FIND_PROCESS_FROM_XY_POS( PX, PY, TPMODEL, KRANK, GINSIDE )
+  ! Find the rank of the process with the given position
+  USE MODD_FIELD,        ONLY: TFIELDLIST
+  USE MODD_IO,           ONLY: ISNPROC
+  USE MODD_PARAMETERS,   ONLY: NNEGUNDEF
+  USE MODD_STRUCTURE_ll, ONLY: PROCONF_ll
+
+  USE MODE_FIELD, ONLY: FIND_FIELD_ID_FROM_MNHNAME
+
+  IMPLICIT NONE
+
+  REAL,             INTENT(IN)  :: PX
+  REAL,             INTENT(IN)  :: PY
+  TYPE(PROCONF_ll), INTENT(IN)  :: TPMODEL
+  INTEGER,          INTENT(OUT) :: KRANK
+  LOGICAL,          INTENT(OUT) :: GINSIDE
+
+  INTEGER :: IID
+  INTEGER :: IRESP
+  INTEGER :: IXPOS
+  INTEGER :: IYPOS
+  INTEGER :: JP
+  REAL, DIMENSION(:), POINTER :: ZXHAT_ll
+  REAL, DIMENSION(:), POINTER :: ZYHAT_ll
+
+  GINSIDE = .FALSE.
+  KRANK = NNEGUNDEF
+
+  ZXHAT_ll => NULL()
+  ZYHAT_ll => NULL()
+
+  call Find_field_id_from_mnhname( 'XHAT_ll', iid, iresp )
+  ZXHAT_ll => tfieldlist(iid)%tfield_x1d(TPMODEL%NUMBER)%data
+  call Find_field_id_from_mnhname( 'YHAT_ll', iid, iresp )
+  ZYHAT_ll => tfieldlist(iid)%tfield_x1d(TPMODEL%NUMBER)%data
+
+  IXPOS = COUNT( ZXHAT_ll(:) <= PX )
+  IYPOS = COUNT( ZYHAT_ll(:) <= PY )
+
+  DO JP = 1, ISNPROC
+    IF (       IXPOS >= TPMODEL%TSPLITS_B(JP)%NXORP .AND. IXPOS <= TPMODEL%TSPLITS_B(JP)%NXENDP &
+         .AND. IYPOS >= TPMODEL%TSPLITS_B(JP)%NYORP .AND. IYPOS <= TPMODEL%TSPLITS_B(JP)%NYENDP ) THEN
+      GINSIDE = .TRUE.
+      KRANK = JP
+      EXIT
+    END IF
+  END DO
+
+END SUBROUTINE FIND_PROCESS_FROM_XY_POS
+!----------------------------------------------------------------------------
+
+!----------------------------------------------------------------------------
+SUBROUTINE FIND_PROCESS_AND_MODEL_FROM_XY_POS( PX, PY, KRANK, KMODEL )
+  ! Find the rank of the process with the given position
+  ! on the most refined model (except if model number is forced)
+
+  USE MODD_IO,           ONLY: ISNPROC
+  USE MODD_PARAMETERS,   ONLY: NNEGUNDEF
+  USE MODD_STRUCTURE_ll, ONLY: PROCONF_ll
+  USE MODD_VAR_ll,       ONLY: TCRRT_PROCONF
+
+  IMPLICIT NONE
+
+  REAL,    INTENT(IN)    :: PX
+  REAL,    INTENT(IN)    :: PY
+  INTEGER, INTENT(OUT)   :: KRANK  ! If < 1, position is outside domain(s)
+  INTEGER, INTENT(INOUT) :: KMODEL ! If > 0 at entry, model is fixed, else it is set by subroutine
+
+  CHARACTER(LEN=3) :: YMODEL
+  LOGICAL          :: GFOUND
+  LOGICAL          :: OINSIDE
+  TYPE(PROCONF_ll), POINTER :: TZMODEL
+
+  KRANK = NNEGUNDEF
+
+  TZMODEL => TCRRT_PROCONF
+
+  ! Go back to the root model
+  DO WHILE( ASSOCIATED( TZMODEL%TPARENT ) )
+    TZMODEL => TZMODEL%TPARENT
+  END DO
+
+  IF ( KMODEL > 0 ) THEN
+    ! Find the configuration corresponding to KMODEL
+    ! based on GO_TOMODEL_ll
+
+    ! Find the model configuration
+    CALL FIND_MODEL( TZMODEL, KMODEL, GFOUND )
+
+    IF ( .NOT. GFOUND ) THEN
+      WRITE( YMODEL, '( I3 )' ) KMODEL
+      CALL PRINT_MSG( NVERB_FATAL, 'GEN', 'FIND_PROCESS_AND_MODEL_FROM_XY_POS', 'model ' // YMODEL // ' not found' )
+    END IF
+
+    ! Find the rank of the process where the position is
+    CALL FIND_PROCESS_FROM_XY_POS( PX, PY, TZMODEL, KRANK, OINSIDE )
+  ELSE
+    ! Model number is not fixed => find the finer model corresponding to the position
+    CALL FIND_FINER_MODEL_WITH_XY_POS( PX, PY, TZMODEL, KMODEL, KRANK, OINSIDE )
+  END IF
+
+END SUBROUTINE FIND_PROCESS_AND_MODEL_FROM_XY_POS
+!----------------------------------------------------------------------------
+
+
+!----------------------------------------------------------------------------
+RECURSIVE SUBROUTINE FIND_FINER_MODEL_WITH_XY_POS( PX, PY, TPMODEL, KMODEL, KRANK, OINSIDE )
+  USE MODD_PARAMETERS,   ONLY: NNEGUNDEF
+  USE MODD_STRUCTURE_ll, ONLY: LPROCONF_ll, PROCONF_ll
+
+  IMPLICIT NONE
+
+  REAL,                      INTENT(IN)    :: PX
+  REAL,                      INTENT(IN)    :: PY
+  TYPE(PROCONF_ll), POINTER, INTENT(INOUT) :: TPMODEL
+  INTEGER,                   INTENT(INOUT) :: KMODEL
+  INTEGER,                   INTENT(OUT)   :: KRANK
+  LOGICAL,                   INTENT(OUT)   :: OINSIDE
+
+  INTEGER :: IRANK
+  LOGICAL :: GINSIDE
+  TYPE(PROCONF_ll),  POINTER :: TZCHILD
+  TYPE(LPROCONF_ll), POINTER :: TZMODELS
+
+  IRANK = NNEGUNDEF
+  GINSIDE = .FALSE.
+
+  CALL FIND_PROCESS_FROM_XY_POS( PX, PY, TPMODEL, IRANK, GINSIDE )
+  IF ( GINSIDE ) THEN
+    KMODEL = TPMODEL%NUMBER
+    KRANK = IRANK
+  END IF
+  OINSIDE = GINSIDE
+
+  IF ( .NOT. GINSIDE ) RETURN
+
+  !If the coordinates are inside the current model, look at its children
+  TZMODELS => TPMODEL%TCHILDREN
+  DO WHILE(ASSOCIATED(TZMODELS))
+    TZCHILD => TZMODELS%TELT
+
+    CALL FIND_FINER_MODEL_WITH_XY_POS( PX, PY, TZCHILD, KMODEL, IRANK, GINSIDE )
+
+    IF ( .NOT. GINSIDE ) THEN
+      TZMODELS => TZMODELS%TNEXT
+    ELSE
+      TPMODEL => TZCHILD
+      KMODEL = TPMODEL%NUMBER
+      KRANK = IRANK
+      OINSIDE = GINSIDE
+      RETURN
+    END IF
+  END DO
+
+END SUBROUTINE FIND_FINER_MODEL_WITH_XY_POS
+!----------------------------------------------------------------------------
+
+
+!----------------------------------------------------------------------------
+RECURSIVE SUBROUTINE FIND_MODEL( TPMODEL, KMODEL, OFOUND )
+  USE MODD_STRUCTURE_ll, ONLY: LPROCONF_ll, PROCONF_ll
+
+  IMPLICIT NONE
+
+  TYPE(PROCONF_ll), POINTER, INTENT(INOUT) :: TPMODEL
+  INTEGER,                   INTENT(IN)    :: KMODEL
+  LOGICAL,                   INTENT(OUT)   :: OFOUND
+
+  TYPE(PROCONF_ll),  POINTER :: TZCHILD
+  TYPE(LPROCONF_ll), POINTER :: TZMODELS
+
+  OFOUND = .FALSE.
+
+  ! Is the current model the searched one?
+  IF (TPMODEL%NUMBER == KMODEL) THEN
+    OFOUND = .TRUE.
+    RETURN
+  ENDIF
+
+  ! no => explore all the children model of the current model
+  TZMODELS => TPMODEL%TCHILDREN
+  DO WHILE(ASSOCIATED(TZMODELS))
+
+    IF (TZMODELS%TELT%NUMBER == KMODEL) THEN
+      OFOUND = .TRUE.
+      TPMODEL => TZMODELS%TELT
+      RETURN
+    END IF
+
+    TZCHILD => TZMODELS%TELT
+
+    CALL FIND_MODEL( TZCHILD, KMODEL, OFOUND )
+
+    IF ( .NOT. OFOUND ) THEN
+      TZMODELS => TZMODELS%TNEXT
+    ELSE
+      TPMODEL => TZCHILD
+      RETURN
+    END IF
+
+  END DO
+
+END SUBROUTINE FIND_MODEL
+!----------------------------------------------------------------------------
+
+END MODULE MODE_POSITION_TOOLS