Shaoning Di, Hao Deng (corresponding author), Dong Chen, Xiancheng Mao, Yanhong Zou, Lixin Wu, Yu Guo, Yangbin Lin, and Liqiang Zhang. PECo: A point-edge collaborative framework for global-aware urban building contouring from unstructured point clouds. IEEE Transactions on Geoscience and Remote Sensing, 2023, accepted.