Abstract: The Beijing-Tianjin-Hebei (BTH) region is one of the most important and rapidly growing urban agglomerations in China. By capturing the dynamic changes of urban land and population in the region and their relevancy, adjusting and optimizing the urban layout and spatial structure, and rational allocation of urban land resources are of great significance to the sustainable development of this region. Based on time series of Landsat images, this study uses the Google Earth Engine cloud platform to extract built-up land in the Beijing-Tianjin-Hebei region, and integrates the results with GlobeLand30, GHS-Built, GAIA and GLC_FCS-2020 land cover products to produce the built-up land dataset during the period of 2000-2020 in the region (BTH_BU). An overall accuracy higher than 90% was obtained. Based on this dataset, we extracted the urban functional boundaries, and calculate the SDG 11.3.1 indicators, land consumption rate (LCR), population growth rate (PGR) and the ratio of land consumption rate to population growth rate (LCRPGR) for each city. The results show that the overall land consumption rate is greater than the population growth rate in the BTH region, and the use efficiency of land resource in small and medium-sized cities continue to decrease. This dataset can be used as the basic data for urban expansion analysis in the BTH region, and applied to the monitoring and assessment of relevant indicators of the sustainable development goals in the region.
Keywords: Beijing-Tianjin-Hebei region; built-up area; land use efficiency; SDG11; urban sustainable development