Method for carrying out forestry investigation with three-dimensional laser scanner utilized

Abstract

The invention discloses a method for carrying out forestry investigation with a three-dimensional laser scanner utilized, and relates to the field of the forestry investigation, in particular to the method for carrying out the forestry investigation with the three-dimensional laser scanner utilized. According to a range of an investigation forest region, reference targets are arranged, and the positions of sites are confirmed. The sites are erected, and data are scanned. Point cloud data of each site are spliced. The diameter at breast height, the tree height and the crown diameter of woods are measured. Amount of growing stock of standing trees is calculated. A three-dimensional forest region map is drawn up. The method for carrying out the forestry investigation with the three-dimensional laser scanner utilized has the advantages of being capable of greatly reducing workload and working time of forestry investigation personnel, and improving investigation efficiency. Meanwhile, the high-precision three-dimensional laser scanner ensures precision of measured data, the trees do not need to be cut down when in investigation, and natural environment is protected. The point cloud data are utilized to build the three-dimensional topographic map of the forest region, a three-dimensional digit file of the forest region is built conveniently, the method can be combined with a 3S technology, and protection, management and subsequent investigation of the forest region are convenient.

Description

technical field [0001] The invention relates to the field of forestry investigation, in particular to a method for forestry investigation by using a three-dimensional laser scanner. Background technique [0002] Forestry survey has a long history of development. At the beginning of the 19th century, Germany had a more accurate forest map and a standing tree volume table prepared by the geometric method. In the mid-20th century, sampling surveys and aerial photogrammetry techniques were used to improve survey efficiency. With the rise of computer technology, 3S technology and remote sensing technology are gradually being used in survey data processing and compilation of graphic materials. In the past 20 years, especially after entering the new century, the technical means of forest survey have been perfected, and a relatively complete forest resources management information system has been established. However, due to the global energy and environmental crisis caused by ec...

AI Technical Summary

Problems solved by technology

For the most important survey items such as forest stock volume and growth volume, visual inspection and traditional surveying and mapping have high accuracy, but the efficiency is low, and it is difficult to meet the needs of large-scale rapid surveys; although remote sensing and aerial photography solve the efficiency problem, they cannot It is difficult to obtain comprehensive and accurate information on forest areas through the vegetation surface. How to solve the contradiction between efficiency and accuracy is an urgent problem to be solved.

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