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NOPPA was a three-year project in VTT Industrial Systems in Finland that started in the year 2002. It was designed to offer public transport passenger and route information using GPS technology for the visually impaired.
NOPPA is an unbroken trip chain for a pedestrian using buses, computer trains and trams in three neighbour cities' area. It is designed on information server concept. It solves information needs of special needs groups.
The information server plays the role of interpreter between the user and internet information systems in the system. It collects information, filters and integrates them from different sources and delivers results to the users. The server handles speech recognition and functions requiring either heavy calculations or data transfer. The data transfer between the server and the client is minimised. The user terminal holds speech synthesis and most of route guidance.
NOPPA is currently able to offer basic route planning and navigation services in Finland. In practice, the limits are map data can have outdated information or inaccuracies, positioning can be unavailable or inaccurate, or wireless data transmission is not always available.
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