Automatic generation method for ground line data

Abstract

The invention provides an automatic generation method for ground line data, and the method comprises the following steps: obtaining the point cloud data of a ground line based on a laser radar; carrying out the processing of the obtained point cloud data; carrying out the data modeling and elevation interpolation according to ground class points in the point cloud data, and obtaining the ground line; drawing the obtained ground line in a visual graphic environment, carrying out the visual inspection and editing of the generated ground line through the superposing of a LiDAR point cloud and DOM data, and finally generating ground line data. The method can achieve the quick automatic obtaining of a designed ground line, improves the road survey and design efficiency, saves the cost of field measurement, and achieves the integration of laser radar measurement and a road construction drawing design. The ground line data generated through the method provided by the invention, compared with the ground line data generated through a digital-analog interpolation method, reflects the real ground surface information more accurately in a region with more constructed objects.

Description

technical field [0001] The invention relates to the field of surveying and mapping, in particular to a method for automatically generating ground line data. Background technique [0002] At present, the efficiency and accuracy of obtaining ground line information in highway survey and design are low. The current mainstream method is to use total station or real-time differential positioning technology (rael-time kinematic, RTK) to stake out the middle pile first, and then use RTK to measure the elevation of each cross section. However, this method uses single-point contact measurement, which leads to a slow operation speed. At the same time, due to the limitations of natural conditions such as weather, traffic, and difficult terrain in the survey area, it is easy to cause low accuracy of surveying and mapping results, difficult to guarantee the construction period, and survey costs. increased adverse consequences. Contents of the invention [0003] In order to solve the ...

AI Technical Summary

Problems solved by technology

However, this method uses single-point contact measurement, which leads to a slow operation speed. At the same time, due to the limitations of natural conditions such as weather, traffic, and difficult terrain in the survey area, it is easy to cause low accuracy of surveying and mapping results, difficult to guarantee the construction period, and survey costs. Increased adverse consequences

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