Fig. 2From: Variation of crater morphological parameters in the landing area of Tianwen-1: relationships with the geological environment and climate changea Six different morphological classes of craters in the study area. Some features are marked with white arrows. b The classification and spatial distribution of craters in HiRISE images ESP_069665_2055 and ESP_069876_2055. c Impact crater study area, indicated by the red box. The red pentagram represents the landing site of Tianwen-1Back to article page