Abstract
Terrestrial laser scanner (TLS) that have utility in the spatial information acquisition was used in such as three-dimensional measurements of the structure and topography. Reflectance values, which have been recorded together with the three-dimensional information, but it is hardly used for the analysis. TLS Reflection values are affected by several factors. For improvement of TLS data analysis, it is important to elucidate the reflection characteristics of several factors. In this study, it elucidated of the characteristics of the observed object and the unit irradiation, as below. Depending on the occupancy in the unit irradiation area of the objects, the reflectance value is change.
