2009 Volume 15 Pages 507-512
The measurement of land-cover classification, vegetation height, bed elevation and size of bed material in the Minochi River is conducted using a terrestrial 3D laser scanner that gives three dimensional coordinates, RGB and reflected intensity from the surface. A series of procedure to produce digital elevation from original laser scanner data is developed. The procedure consists of algorithms to get rid of virtual image data due to reflection at water surface, to classify land-cover into water, vegetation and cobble areas, to interpolate the land cover and bed elevation where the laser light does not reach, and to estimate vegetation height and bed material size. Resultant DEM, vegetation height and size of bed material show good agreement with those measured by conventional surveying.
