The bulk of this exciting database is kept in the Royal Museum for Central Africa (RMCA) in Tervuren, in the form of hundreds of boxes of aerial photographs of the Congo forests. The data takes the form of multiple square pictures, each taken along a precise flight plan. While some of the images were already digitalized at a low resolution by the RMCA, we aimed to produce higher resolution scans, in order to maintain the quality of the data throughout digitalization, and enable detailed image analysis (such as textural analysis) on a later stage. In order to do so, we set the resolution of the scan slightly above the grain of the photographs and, through trials and error, 2400 dpi was accepted as the minimum necessary resolution.
The scanning process thus begins, with a first milestone in mind: the digitalisation of the aerial photographs of Yangambi reserve, from 1958-59. This zone covers roughly 5 000 km2 of tropical forest and is the location of many eco-physiological and climate data collections involved in the COBECORE project.
digitization remote_sensing aerial_photography