Data Recording for Advanced Driving Assistance System Testing and Validation

A system for assessing progress of a data recording campaign performed to collect sensor data recorded by a sensor data recorder mounted on a vehicle, the system including a metadata generating apparatus arranged to process data acquired by a sensor module to generate metadata for the sensor data, the metadata comprising classifications of an attribute of a driving environment the vehicle was in during the acquisition of the sensor data into respective classes of a predefined set of classes of the attribute, and transmit the metadata to a remote metadata processing apparatus, which is arranged to determine whether the metadata comprises at least a predetermined number of classifications in a predefined class of the set of predefined classes and, based on the determination, generate an indicator for use in the data recording campaign.