By Matthias Bürgi, Elena G. Siegrist and Tamara Estermann.

2. Elena G. Siegrist (biography)
3. Tamara Estermann (biography)
How can we visualise changes in landscapes such as melting glaciers, expanding forests, and changes in agriculture and settlement structure? How can such visualisations be incorporated into participatory research processes?
A prime source for documenting landscapes at the local scale and from a human perspective is repeated terrestrial photographs from the same location under similar conditions. Repeat photography is the creation of “then and now” pairs by retaking historical photographs from the same location. This is useful for scientific research, as well as to raise community awareness of landscape changes.
Here we describe how repeat photography can be used, as well as its strengths and weaknesses, highlighting its value for transdisciplinary sustainability science.









