Fig. 1From: Small- and medium-sized rice fields identification in hilly areas using all available sentinel-1/2 imagesLocation and topography of Chongqing, China (a). Topography of Zhongxian County (b) and Dianjiang County (c) with samples overlaid. Rice phenology in the study area and the number of Sentinel-1 and Sentinel-2 images for each month during the rice phenology period (d)Back to article page