Historical & repeat photographs as a source of qualitative & quantitative biodiversity information

<div>This presentation was given at UCT's Open Data Day on 6th March 2020.</div><div><br></div><div>The presentation outlines the utility of repeat photography in understanding changing landscapes, through citizen science.</div><div><br></div><div>Historical landscape photographs are scientifically valuable evidence of what landscapes looked like in the past and can be a useful source of biodiversity data in otherwise data-deficient geographic regions. <br></div><div><br></div><div>Acquiring repeats of historical photographs on broad geographic scales is possible through rePhotoSA, a collaborative citizen science project led by the Plant Conservation Unit and the FitzPatrick Institute at UCT, which hosts an open online repository of historical landscape images. </div>