Contemporary developments in wireless communication and increases in the power and connectivity of hand-held devices present us with increasing opportunities to provide access to computing resources irrespective of geographical location. This increase in portability opens up a range of opportunities to allow access to important data on site. The work described here aims to increase the accessibility of data relating particularly to cities by integrating a palmtop device into a complementary suite of web-based tools. Central to the project are a database of underlying city data and a 3D model of the city.