Generalities
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The sd_proj_mesu data structure is attached to the data structures from PROJ_MESU_MODAL or to the data structure from MACR_ELEM_STAT (if the keywords PROJ_MESU and MODE_MESURE are specified).

It is used to create a supermesh resulting from the measurement.

This supermesh is obtained by launching PROJ_MESU_MODAL and MACR_ELEM_STAT in succession.

DEPL_INTERNE also uses it to calculate information at measurement points (sensors) from information calculated at supermesh nodes.