The rapid development of economy has put forward higher requirements for highway construction in China, and the total mileage of new highways has been increasing. Because of the complex terrain, great difficulty and high error probability, road survey has become the bottleneck of road construction and development. The application of computer technology and image extraction measurement technology has brought new development opportunities for road survey and design. This paper briefly discusses the application of computer technology in road survey and design.
Keywords: computer; Influence extraction; Road survey and design; App application
As the lifeblood of China's economic development, the construction and development of highway and railway transportation have an important impact on China's economy. The traditional measurement technology is difficult to measure the survey area of complex terrain, and the error rate is high. In order to reduce the error and ensure the quality of survey and design, it is often necessary to survey repeatedly and take the average value to reduce the error, which greatly affects the construction progress and construction period of road engineering. Improving the efficiency of survey design and accelerating the application of new survey technology have become the primary tasks of relevant departments and personnel of road survey in China.
1, Importance Analysis of Road Survey
Road construction survey has an important impact on road quality. Due to the characteristics of highway engineering, the survey environment is difficult and the terrain is complex, so it is difficult to survey and set out. Survey and measurement is the direction of road engineering. Only by ensuring the accuracy and thoroughness of survey and measurement can the smooth construction of road engineering be ensured. Therefore, accelerating the introduction and application of new technology in highway engineering survey is of great significance to the construction and development of highway engineering. Road engineering construction enterprises must attach importance to the introduction of new surveying technology, and speed up the efficiency and accuracy of road engineering surveying through the application of computer technology and GPS technology.
2. Application analysis of computer technology in road survey.
Application of image extraction technology in road survey
The application of computer technology in road survey greatly reduces the difficulty of road engineering survey and design, and solves many difficult problems in the process of road survey. Among them, the application of digital close-range photogrammetry software is the most representative The application of digital close-range photogrammetry software is to extract three-dimensional information from two-dimensional images through computer software. In practical work, only a few image control points are needed for survey and measurement, and then some image data are taken near the phase control points, which can be put into the system for measurement and reconstruction. Through the application of digital close-range photogrammetry software in highway survey, the total station only needs to survey a few control points, and the digital camera for non-professional survey can also be used as a survey camera after calibration. Through shooting the engineering scene image, matching, orientation and aerial photography processing, the parameters of the image are calculated, so as to generate the required orthographic image, contour line, DEM and other data. The application of digital close-range photogrammetry simplifies the point-by-point measurement in highway engineering survey to "area" measurement, and with the introduction of automation, the intensity of highway engineering survey is greatly reduced and the work efficiency is improved.