We would not have been able to undertake this project without those members of the public who came to our open days, field visits and lectures, who helped curate and test-drive our website, who produced data, and who worked with us to develop the methodological considerations detailed here. We are very grateful to John Wells and the SNAPS scheme for introducing us to the joys of kite photography. This project was supported by an Arts and Humanities Research Council grant award AHRC (UK) AH/L007916/1 'Co-production of alternative views of lost heritage of Gwynedd'. The Royal Commission on the Ancient and Historical Monuments of Wales provided us with access to the National Monuments Record. Two anonymous peer-reviewers are thanked for their comments on an earlier draft of this article.