Fig. 2From: Spatial–temporal distribution and evolution of the socialist built heritage in China, 1949–1978Kernel density distribution for each SBH type. a Type A (N = 76); b Type B (N = 72); c Type C (N = 154); d Type D (N = 71); e Type E (N = 83); f Type F (N = 44); g Type G (N = 255); h Type H (N = 79); i Type I (N = 27)Back to article page