Our intention in presenting this model is not to argue against logical positivism or the scientific perspective in general, but to argue for a plurality of perspectives in the process of constructing and communicating knowledge in support of spatial planning and environmental management. This will not lead to the elimination, or even reduction, of bias in the process. However, by incorporating the perspectives (and biases) of relevant actors it will lead to more appropriate representations of reality and to ownership of the process, and its resultant representations, by stakeholders.