BNU-1 is China’s first low-cost remote sensing satellite specifically designed for monitoring polar environmental changes. It is also the first experimental satellite of the Three Poles Scientific Experiment. The satellite adopts a unique combination of temporal and spatial resolutions, and utilizes on-orbit variable exposure imaging technology to address the challenges posed by high albedo and dynamic imaging characteristics in polar regions, giving it an advantage in polar environmental monitoring. In this study, based on remote sensing data from BNU-1 acquired in 2020 and 2021 over Greenland, a segmentation stretching techniques was applied to create two mosaic mapping of whole Greenland. Compared to commonly used linear stretching methods, this approach demonstrates superior visual effects and more grayscale levels, better preserving surface feature information while effectively highlighting various land features in polar imagery. With a geometric resolution of 80 m for both datasets, these annually high-resolution remote sensing data provide a new attempt using domestically developed low-cost remote sensing satellites for studying environmental changes in Greenland.