A length measure type for recording displacement or movement measurements. Extends the standard length measure with an attribute to identify which feature experienced the displacement (e.g., shear plane, fault, bedding plane, joint). This is commonly used in structural geology, slope stability monitoring, and landslide investigations to document the magnitude and direction of movement along discontinuities.

The type of geological or structural feature along which the movement occurred (e.g., bedding plane, joint, fault, shear surface, fracture). This identifies what was displaced and provides context for the movement measurement.