Deep learning-based building height mapping using Sentinel-1 and Sentienl-2 data

•Building height samples were generated from Sentinel 1/2 and publicly available data.•A dual-branch structure building height estimation network was proposed.•A novel module was designed to facilitate optical and SAR features fusion.•The spatially continuous building height mappings with 10-m resolution were produced.•Our method offers new possibilities for fine resolution building height mapping of China.