What are the main applications of aerial survey technology in road survey and design?

Application of Aerial Survey and Remote Sensing Technology in Highway Survey and Design

Aerial survey and remote sensing of unmanned aerial vehicle (UAV) takes UAV as the aerial platform and obtains information from airborne remote sensing equipment, such as high-resolution CCD digital camera, light optical camera, infrared scanner, laser scanner and magnetic detector. The image information is processed by computer to make it into an image according to certain accuracy requirements. The whole system has outstanding characteristics in design and optimization combination, and it is a new application technology integrating high-altitude shooting, remote control, telemetry technology, video image microwave transmission and computer image information processing. In order to meet the overall needs of urban development, provide comprehensive geographical and resource information. Correct and complete information is the basis of scientific decision-making. All regions and departments need the latest and most comprehensive topographic data in comprehensive planning, field archaeology, land consolidation monitoring, irrigation and water conservancy construction, infrastructure construction, factories and mines construction, residential area construction, environmental protection, ecological construction and so on, which has become an urgent problem for government departments at all levels and new development zones. Kunming Jinying UAV accurately reflects the newly discovered historical sites, newly built streets, bridges, airports, stations, land resources utilization and other comprehensive information in the region by remote sensing aerial photography technology. Remote sensing aerial photography technology is a new application technology that optimizes and combines various advanced means.

Remote sensing technology is widely used in highway engineering in China, which plays an irreplaceable role in highway survey and design and plays a very important role in highway construction in China.

I. Remote Sensing Mapping of Highway Planning Scheme

The macro, authenticity and comprehensiveness of remote sensing images provide us with reliable identification and analysis basis of topography, geological structure and ground objects, which has incomparable advantages over other methods. For example, in mountainous areas with extremely complex topography and geological structure, it is very difficult to plan and compare the schemes of high-grade highways with conventional methods. Geomorphology and structural features can only be seen from large-scale satellite remote sensing images. Through the processing of satellite remote sensing images of 1: 10000 and 1: 60000, the relationship between the trend of highway design schemes and topography is clearly and intuitively displayed, which broadens the horizons and ideas, puts forward new schemes with high comparative value, speeds up the comparison of schemes and improves the understanding level.

Second, the highway tunnel remote sensing geological demonstration route selection

The scale of high-grade highway tunnels is generally relatively large. With the appearance of long tunnels, the investment is huge. Choosing the optimal line position can often save tens of millions or even hundreds of millions of yuan, which is of great significance. Remote sensing technology plays a key role in route selection optimization of highway tunnels.

Three, highway engineering geological mapping and remote sensing survey of adverse geological phenomena

(1) Remote sensing engineering geological mapping. Traditional engineering geological mapping (geological mapping) is realized by technicians' field work, which is time-consuming, laborious and inefficient, and many geological problems are difficult to observe and figure out because people's vision is blocked by topography and vegetation. The richness of remote sensing image information provides the most intuitive basis for engineering geologists, which can greatly speed up the work.

(2) Remote sensing interpretation and prediction of adverse geological phenomena. Bad geological phenomenon is the main hidden danger of highway construction, and the disaster problems of high-grade highways that have been built at present are mainly caused by bad geological problems. Therefore, the application of remote sensing technology to interpret and investigate various unfavorable geological phenomena is a necessary link to improve the quality and level of survey and design, and has also achieved good application results in practice.