P3DM works best at 1:5000 – 1:10000 scale or larger. The larger the scale (1:5000 is larger than 1:10,000), the more detailed and diversified the input of the knowledge holders will be. As a consequence, P3DM can be applied on moderately large areas (1000-4000 km2) at a time, although repeated exercises may result in the full coverage of small island nations. In countries covering large portion of the Earth, P3DM can and should be applied on selected “hot spots” to address specific issues.
As a follow-up to the 2006 “Mapping for Change” Conference which took place in Nairobi, the Community of Practice devoted to the improvement of Participatory GIS (PGIS) practice, developed guidelines on “Practical ethics for PGIS practitioners, facilitators, technology intermediaries and researchers” available 12 languages.
Data generation is part of the P3DM process, but not its end. Evidence has proved that as a result of the process, knowledge holders gain a deeper understanding of their bio-physical and social environments, heightened awareness on the importance of sound and climate-smart resource management and more. Data are usually generated to serve the process as the communities (all generations) learn by doing and to empower knowledge holders in interfacing with higher authorities.
Sharing of data is strategic and meant to serve purposes set by the knowledge holders. On the other hand the process allows for traditional and scientific knowledge systems to come together and make use of or build on the best of the two “worlds”.