With the coming forth and extensive application of the 3D laser scanner in the surveying and mapping field, the processing of massive 3D laser scan data has become one of the nasty solvable problems. Based on the problem that we met in the process of reading massive 3D laser scanner data, the data mapping and data division technique is put forward to solve the time-wasting problem while reading the data and optimizing the data structure. The main contents and contributions in this thesis can be summarized a...