This lecture covers Geographically Weighted Regression (GWR), a method for exploring spatial non-stationarity in relationships between variables. It discusses the basic hypothesis, influence of explanatory variables, W Matrix, Kernel functions, and the comparison between Ordinary Least Squares (OLS) and GWR. The lecture also includes a case study on estimating net primary production in Chinese forest ecosystems using GWR. Conclusions highlight the advantages of GWR in providing location-specific insights and reducing bias compared to OLS.