Navigation software is integrated with other kinds of software running on the same device so that capabilities of the navigation software can be made available from within the other applications. Those applications can export street, city or postcode format address data to the navigation software. The address data can then be converted to a co-ordinate system based address by the navigation software, which can then automatically be set as the destination address used by the navigation software in calculating the route and/or automatically marked on a map generated and displayed by the navigation software.