随着无人机和倾斜摄影技术出现，为了快速获取数字线划图提供了技术支持，但

With the emergence of drone and tilt photography technology, technical support has been provided for the rapid acquisition of digital line drawing, but close to the traditional large-scale mapping mode, it has been unable to meet the requirements of data acquisition. , Low efficiency, high cost and other shortcomings, need to improve and update the data acquisition method.

With the emergence of drones and tilt photography technology, in order to quickly obtain digital line drawing provides technical support, but close to the traditional large-scale scale mapping model, has been unable to meet the requirements of data acquisition, its mode of operation is widespread operating cycle long, low efficiency, cost and other shortcomings, the need to improve and update the way of data acquisition.

With the emergence of UAV and tilt photography technology, in order to quickly obtain the digital line drawing provides technical support, but close to the traditional large-scale mapping mode, it has not been able to meet the requirements of data acquisition. Its operation mode generally has the disadvantages of long operation cycle, low efficiency, large cost and so on, so it needs to improve and update the data acquisition mode.<br>