摘要
在推进地理国情普查数据深度应用的背景下,结合基础测绘中大比例尺地形图高程信息快速更新的实际需求,该文提出了基于地理国情普查机载LiDAR数据更新基础测绘中大比例尺地形图高程点的方法,并设计了完整的生产技术流程。经与外业RTK实测结果对比分析,更新后高程点精度满足规范要求,效率提高两倍以上。已将该方法应用于北京市1∶2000地形图高程点的更新工作,为地理国情普查数据的推广应用提供了新的思路。
In the context of further application of terrain elements from national geographic conditions census,combining with the actual requirement of updating elevation information from DLG,this paper presented the method to update elevation points of DLG using LiDAR.Compared with the results of RTK measured in the field,the accuracy of the updated elevation point meets the requirements,and the efficiency is improved by more than twice.The whole process of data processing has been applied in the 1∶2000 DLG updating in Beijing,which provides a new idea for the popularization and application of national geographic conditions census results.
出处
《北京测绘》
2017年第5期83-87,共5页
Beijing Surveying and Mapping
关键词
地理国情普查
机载激光雷达
基础测绘
高程更新
national geographic conditions census
airborne LiDAR
basic surveying
elevation updating
