System for use in a vehicle

A system for use in a vehicle for determining terrain type in proximity to a vehicle, the system comprising:

• a processor configured to receive primary output data from at least one vehicle-mounted sensor and secondary output data from a secondary data source;
• and
• a data memory configured to store pre-determined primary data relating primary output data for the at least one vehicle-mounted sensor to a particular terrain type, and store at least one data set relating to one or more terrain types;
• wherein the processor is further configured to compare the primary output data with the pre-determined data to determine an indication of the particular terrain type corresponding to the primary output data, and wherein the processor is further configured to compare the secondary output data with a data set corresponding to the indication of the particular terrain type, wherein the indication of the particular terrain type is adjusted in response to the comparison of the secondary output data with a data set corresponding to the indication of the particular terrain type.