This paper describes research to evaluate the use of a public participation geographic information system
(PPGIS) methodology for national park planning. Visitor perceptions of park experiences, environmental
impacts, and facility needs were collected via an internet-based mapping method for input into a national
park planning decision support system. The PPGISmethod presupposes that consistent with the dominant
statutory framework, national parks should be managed for both visitor enjoyment and natural and
cultural resource protection. This paper: (1) describes the PPGIS method used in a 2009 park planning
study conducted for national parks in the Greater Alpine region of Victoria, Australia; (2) presents and
evaluates selected results of the Greater Alpine study and provides examples of how PPGIS data can
be used for decision support in park planning; (3) provides a summary of lessons learned including a
discussion of future implementation constraints. The results demonstrate that an internet, participatory
mapping method, though not without limitations, can be effective in measuring visitor experiences,
environmental impacts, and facility needs for a variety of park planning processes. PPGIS expands a park
agency’s repertoire of methods to engage the public in planning and can help build and sustain trust in
a park agency’s planning process and decisions.