The development of 3D remote sensing imageries has made it possible to derive highly accurate forest inventory results. Especially in the case of airborne laser scanning (ALS) data there have been a lot of activities in Nordic countries during recent years. Basically, the data can be utilized either area based or by recognizing individual trees. 3D remote sensing data can also be utilized by using optical data from different view angles. This course will concentrate on above mentioned advanced remote sensing topics. The course include both lectures and also a lot of exercises as well as course work after the course.