Fig. 6: Maximum error registration quality matrix.

This matrix diagram visualizes the maximum registration error between each pair of scanning stations. Rows and columns correspond to individual station numbers. Each cell’s color indicates the connection quality based on the maximum error: green represents a high-quality connection with a maximum error below 0.015 m; yellow indicates an intermediate connection with a maximum error below 0.015 m; and red signifies a connection where the maximum error exceeds 0.020 m. The predominance of green cells across the matrix demonstrates a high-strength registration network with robust inter-station connections, which ensures the overall geometric reliability of the point cloud model.