Calculate human settlement index (HSI) HSI's definition can be found in Lu et al. (2008) and Chen et al. (2014)'s publication. Nie et al. (2017) makes some modification by the aiming of calaculating the Urban Range and clustering high (middle, low) intensity residential area.
Flow chart of HSI Calculation(From Nie et al. (2017))
Chen, F., X. Yang, and W. Zhu, 2014: WRF simulations of urban-heat island under hot-weather synoptic conditions: The case study of Hangzhou City, China. Atmos. Res., 138, 364–377, doi:10.1016/j.atmosres.2013.12.005
Lu, D., H. Tian, G. Zhou, and H. Ge, 2008: Regional mapping of human settlements in southeastern China with multisensor remotely sensed data. Remote Sens. Environ., 112, 3668–3679, doi:10.1016/j.rse.2008.05.009.
Nie, W., B.F. Zaitchik, G. Ni, and T. Sun, 2017: Impacts of Anthropogenic Heat on Summertime Rainfall in Beijing. J. Hydrometeor., 18, 693–712, https://doi.org/10.1175/JHM-D-16-0173.1