The major topics in mensuration are theory and application of measuring wood, single tree and stand characteristic such as volume, weight. The purpose of this course is let students to learn the theory about surveying and familiar in this technique. This course introduces the fundamental concepts of geometrics: from the traditional terrestrial measurements to the modern measurement and spatial technologies such as GPS, Photogrammetry and remote sensing, and Geographical information systems, and unmanned aerial vehicles the applications on forest planning and measuring etc.