大比例尺地形图动态更新与比较分析OA

Large-scale topographic maps are an important basis for urban planning and natural resource management,and data availability is the vitality of topographic maps.Through practical engineering cases,dynamic updates of large-scale topographic maps were carried out by using aerial photogrammetry,oblique photogrammetry,and mobile measurement methods.The accuracy,efficiency,and advantages and disadvantages of the results obtained by these three methods were compared.The practical results indicate that relevant workers should adopt the best data collection method according to the actual engineering environment and achieve efficient and reliable data acquisition for dynamic updates of large-scale topographic maps.The results have high reference value and play a positive role in promoting the development and transformation of new equipment and technologies for basic surveying and mapping.