But
===

The OBSERVATION macro command uses the PROJ_CHAMP, CREA_CHAMP,, CREA_RESU,, MODI_REPERE, and POST_RELEVE_T operators to:


*
    *
        * project a field from a numerical model to an experimental model,


        * change local landmarks,


        * select the "measurement" degrees of freedom,


*
    *
        * calculate the average value of a deformation field in order to obtain the equivalent of the information delivered by a deformation gauge

This macro command accepts an evol_elas, dyna_trans, dyna_harmo or a mode_meca concept as input. The product concept is of the same type as the input concept. Warning: *Code_Aster* does not remember the marks in which the fields are written. The result of this macro command should therefore not be used in subsequent *Code-Aster* calculations. It can be used for post-processing in Python, or for visualizations.