Eichungf(photogrammetry: the process of determining the relationship between the positions of images on the negative and the positions of the corresponding objects on the ground); Kalibrierungf(photogrammetry: the process of determining the relationship between the positions of images on the negative and the positions of the corresponding objects on the ground)
calibration To mark the scale of a measuring instrument so that readings can be made in appropriate units['kælɪ'breɪʃ(ə)n]s