Nowadays, the urban design, planning and environmental management of areas suffering territorial imbalances require exploiting the ever-increasing availability of data about the natural and built environments, while promoting stakeholder engagement and empowering local communities. In the framework of an ongoing doctoral thesis, this paper contributes to the topic of digital representation of marginal landscapes, presenting three rapid and low-cost 3D modeling workflows relying on available data from different sources. The case study for this experimentation is the Val di Sole, an Italian inner mountain valley in the Trentino-Alto Adige region, whose multidimensional representation could support information management activities relevant to landscape planning and urban design towards the enhancement of its social-spatial resilience.