 The study presents an algorithm called Superpixel River Collapse, SURC, that converts dual line rivers to single line rivers based on raster data by segmenting the rivers at different levels of detail using a Superpixel method, connecting the edge midpoints and center of Massabeech Superpixel, and applying an interpolation algorithm to maintain the uniform distribution of feature points. The SURC method can progressively collapse the river during scale transformation to support LOD representation in a highly sensitive way and generate smooth single line rivers from dual line rivers while avoiding burrs and fractured intersections. This article was authored by Ilam Shen, Ting Hoa Ai, Jin Shen Li, and others.