Potentials of TanDEM-X Forest/Non-forest Map for Change Detection

Abstract

For the TanDEM-X digital elevation model, with a Resolution of 12 m x 12 m, two global acquisitions and up to 10 images over difficult terrain have been acquired. From such acquisitions, the TanDEM-X Forest/Non-Forest Map has been generated by mosaicking more than 500,000 quicklook images with 50 m x 50 m resolution. Such an amount of data can be further exploited to investigate the potentials of the TanDEM-X Forest/Non-Forest Map for change detection, adding a new layer and valuable information to this product. At a local scale, TanDEM-X full resolution images, with 12 m x 12 m interferometric resolution, can be used for forest monitoring applications. High resolution allows for an increase of detail in Forest/Non-Forest classification. By associating the height information, provided by the digital elevation model with the forest or non-forest information, provided by the Forest/Non-Forest Map, it is possible to detect changes due to deforestation activities as well as changes due to forest degradation caused by natural phenomena, such as fires or storms. This paper addresses the Investigation and first results of the potentials of TanDEM-X products for change detection purposes and the possibilities offered by TanDEM-X high-resolution images for forest monitoring.