“The reporter learned from the research on building change detection in southern China that the data from China's independently developed Land Detection No.1 01 A/B satellite (LT-1A/1B) has potential applications in the field of change detection. A urban building change detection algorithm based on LT-1 data is proposed, which integrates amplitude features and coherence information of multi temporal synthetic aperture radar (SAR). Through building recognition, color gamut segmentation, and coherence change constraints, the change area of urban buildings is obtained and the change period of buildings is located. The experimental results have verified the reliability of the algorithm and provided solutions for fields such as urban planning and illegal construction investigation.”