Part of Jizerka stream watershed
Photogrammetric modelArea: 6780 m2 Average height above mean sea level: 860 meters
3D model shows part of the Jizerka stream in the Jizerka village. This area is famous for historical and current illegal sapphire mining. This area has been historically famous for precious stones (sapphire and izerine) which makes it still attractive for individual searchers. Currently any mining activities are strictly forbidden. 3D model enabled to study past systematic mining in this area, including estimation of number of stones obtained.