Sub-Meter Urban Construction Site Mapping via a Semi-Automatic Deep Learning Framework: Nationwide Patterns and Dual-Track Renewal

The TIFFs comprise mosaicked GF-2 imagery of Qinhuangdao City. Due to the large file sizes, certain TIFFs were split into multi-part archives (e.g., mosaic_result_3.part10.rar). Hebei_UCS_Result is the extracted urban construction site (UCS) result for Qinhuangdao City. 600 manually delineated UCS labels contains 600 manually delineated UCS labels aligned to GF-2 image tiles over Beijing and Qinhuangdao area. Due to the large file sizes, certain images were split into multi-part archives (e.g., 600 manually delineated UCS labels.part1.rar). Hebei_qinhuangdao_Boundary contains the shapefiles for Qinhuangdao City’s administrative boundary (City Boundary) and urban boundary (Urban Boundary). China_Polygon_Json.geojson contains the boxed checklist tile footprints (in GeoJSON format) together with the corresponding acquisition-window metadata.