Application Of High Precision UAV Remote Sensing In Geological Disaster Investigation

With the development of society and economy, each trade of the society is in urgent need of high-resolution remote sensing image. There is higher and higher requirement of real-time quality and validity for high-resolution remote sensing image. A kind of remote sensing system called Unmanned Air Vehicle is a new technology in recent years. It can be used as an effective supplementary means of conventional measuring method such as satellite remote sensing and aerial photogrammetry. Its characteristics focuses on following aspect:(1) It can take a low altitude flying under the cloud making up for the deficiency of data collection by satellite remote sensing and ordinary aerial photogrammetry. (2) It costs less money for data acquisition using UAV rather than satellite remote sensing and aerial photogrammetry. (3) Using digital cameras as sensor can collect good quality and high resolution (can reach 10cm) images. (4) The UAV platform has a high mobility and flexibility. It will be implemented landing in small place with low demand for the weather conditions. These features of UAV are especially suitable for small range of resource survey and disaster survey.The aim of this research is to found out a set of practical methods for the application of UAV remote sensing in geological disasters investigation. By the identification and interpretation of UAV remote sensing image, it can be investigated the distribution characteristics and damage degree of geological disasters providing the basis for the monitoring of disasters and technical service for the disaster prevention and reduction.In this paper, on the basis of data information collected by UAV from Yan'an Zichang, We carried out the processing and interpretation of UAV remote sensing images, and then rechecked the correctness of the results. The whole work flow about UAV remote sensing data procurement, process and application was proposed. It will provide the technical support for the new method of UAV remote sensing in geological disasters investigation. The work in this paper focuses on following aspect:1. It was illustrated the technical advantage of UAV in geological disasters investigation as a new kind of remote sensing platform comparing with components and features of other remote sensing platform.2. Through carrying out the subject research on national finance monitoring special-UAV remote sensing in geological disasters investigation in Yan'an Zichang, it was analyzed the process of the pre-flight preparation, technical inspection, flight parameter setting flight control, on this basis to study the flight quality control.3. We made a post production with aerial photos collected by UAV to produce the orthophoto map and then we summed up the orthophoto map production process. During the procedure we did a research on how to increase the accuracy of the aerial photo.4. It was studied for interpretation methods of high-precision UAV remote sensing images in loess region and determined the appropriate interpretation mark. In the experimental area of Yan'an Zichang, we carried out the interpretation in high-precision UAV remote sensing images of geological disasters and geological environment. It was corrected after the field check of interpretation results.