===Procedure for METIS_img_n_cal_platescale ===
 
The plate scale and true North calibration template is used on astrometric fields (asterisms or globular clusters, tied to GAIA) in order to determine the plate-scale and calibrate the true North angle on sky. The observing template is identical to the ''METIS_img_n_obs_GenericChopNod'' template, and it is combined with ''METIS_img_n_acq'' that is used to acquire the field.

===Parameters for METIS_img_n_cal_platescale ===

^Parameter             ^Hidden     ^Range (default)            ^Label^  
|DPR CATG              |yes        |CALIB TEST (CALIB) |Data product category|
|DPR TYPE              |yes        |PLATESCALE (PLATESCALE)|Data product type|                      

All other parameters are identical to ''METIS_img_n_obs_GenericChopNod''