Research on public-participation geo-spatial technologies is largely directed at taking advantage of the potential broad reach of the Internet. In particular, Web-based GIS applications support asynchronous participation by individuals in different locations. Public involvement is, however, facilitated to a significant extent at community meetings and charettes where people meet face-to-face, review spatial information, and collectively arrive at inferences that inform decisions and choices. In this paper, we describe ongoing work on how a collection of digital interface devices, intelligent software agents, and conventional paper-based tools can facilitate face-to-face collaboration among members of small groups. We also present some preliminary observations about incorporating this approach and an agenda for future research. Public participation GIS (PPGIS) is concerned with a range of issues raised by the intersection of community interests and geo-spatial information technologies. The objective is to discover and address the limitations and potentials of using these technologies to facilitate and enhance broad participation in public policy and decision-making. Issues that have been raised in the literature on PPGIS, as captured in Craig, Harris, and Weiner (2002) for instance, can be broadly organized into three categories: societal issues, data issues, and technological issues.
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