  Augmented Reality (AR) bridges the gap between the physical and virtual
world. Through overlaying graphics on natural environments, users can immerse
themselves in a tailored environment. This offers great benefits to mobile
tourism, where points of interest (POIs) can be annotated on a smartphone
screen. While a variety of apps currently exist, usability issues can
discourage users from embracing AR. Interfaces can become cluttered with icons,
with POI occlusion posing further challenges. In this paper, we use
user-centred design (UCD) to develop an AR tourism app. We solicit requirements
through a synthesis of domain analysis, tourist observation and semi-structured
interviews. Whereas previous user-centred work has designed mock-ups, we
iteratively develop a full Android app. This includes overhead maps and route
navigation, in addition to a detailed AR browser. The final product is
evaluated by 20 users, who participate in a tourism task in a UK city. Users
regard the system as usable and intuitive, and suggest the addition of further
customisation. We finish by critically analysing the challenges of a
user-centred methodology.
