Abstract: With the continuous development of digital china and the digital economy,the number of large-scale surveying and mapping projects has increased significantly.The traditional “two-level inspection and one-level acceptance” approach is no longer sufficient to meet the high-quality development requirements of modern large-scale surveying projects.This paper takes the Jiaxing city 3D engineering construction project as a case study and introduces the “4M1E” quality control model,which is widely used in manufacturing and other fields.By restructuring the relationships between the man,material,machine,method,and environment within the surveying context,this approach enables comprehensive quality management throughout the entire process and all elements of large-scale surveying projects.The results indicate that in this project,the quality pass rates of terrain-level geographic scene data,3D model data,and land-use entity data all exceeded 98%,with all phase tasks completed on schedule,effectively reducing the overall project cost.The study demonstrates that the restructured “4M1E” model can meet the quality management needs of modern large-scale surveying projects,effectively improving project efficiency and quality.

Key words: 4M1E, quality control, large-scale surveying and mapping projects