Method for generating road design surface information by laser radar scan

A technology of laser radar and laser scanner, which is applied in calculation, cross-section drawing, special data processing application, etc., can solve the problems of poor precision and low efficiency of actual measurement, and achieve the effect of high precision, high efficiency and automatic acquisition
CN102445186AActive Publication Date: 2012-05-09中交和美环境生态建设有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中交和美环境生态建设有限公司
Publication Date
2012-05-09

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Abstract

The invention discloses a method for generating road design surface information by laser radar scan, which comprises the following steps: a, an airplane or automobile is used for collecting data for a platform-carried laser scanner; b, original laser point cloud is classified to a ground point type and a non-ground point type; c, the point cloud data of the classified ground point types can be used for generating road surface information required by design; d, for regions with the point cloud density of the ground point type less than 4 / m<2>, an alternative point is automatically extracted from the non-ground point type point cloud; e, a sectional profile is taken as a projection surface, the extracted section point, ground point, non-ground point and alternative point are stacked for displaying, artificial auxiliary edit is carried out, in the section ground line, the alternative point is added, or an abrupt abnormal point is removed; and f, accurate section ground line surface information after editing is output according to a format required by the road design. The method of the invention has the advantages of rapidity, high efficiency and high stability; and is suitable for collecting information of construction, reconstruction and extension of various complex road surfaces.
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Description

technical field

[0001] The present invention relates to the technical field of highway surveying and design, and more specifically to a method for generating surface information required for highway survey and design by laser radar scanning. information extraction. Background technique

[0002] Obtaining accurate and rich three-dimensional information (cross section, longitudinal section) of the surface is an important task in highway survey and design. The current method is to use the total station or GPS-RTK to measure the ground point or the ground line of the section required for the design in the field. This method requires a lot of manpower and material resources to generate highway surface information, and the efficiency is very low.

[0003] With the continuous updating of surveying and mapping new technologies and equipment, various methods of obtaining surface information have been proposed. The more commonly used method is to use the digital elevation model to ...

Claims

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