An Investigation of Low Altitude Photogrammetry and 1:500 DLG Production Technology Applications in Tourism and Scenic Spot--Taking TianQuan Lake Tourism Scenic Area in Sichuan as an Example

摘要

The village traveling project at JingBar reservoir TianQuan Lake is the key construction project in Nanjiang County, Sichuan Province. In order to obtain more accurate objective information, scenic spot investigation using unmanned aerial vehicles (UAV) and aerial photogrammetry replaced the traditional method of satellite remote sensing image acquisition. The research in this project relies on elaborated details of the aerial survey of the scenic spot, the control points layout scheme, the method of measurement, the aerial triangulation step and the production process of 1:500 digital line graphic (DLG). The results show that the method to obtain the image of the study area is clear, has a rapid acquisition process and the data has high precision, which satisfies the needs of the scenic area planning, design and investigation. At the same time, this can greatly reduce the labor cost. So, the technology in national scenic area ecological planning survey project has great reference value. Research can provide a detailed and comprehensive reference for achieving high precision requirements in the future of the large-scale, low-altitude 3D photogrammetry surveying and mapping products.