On the basis of the existing preliminary accuracy validations of ZY-3 satellite imagery,a further in-depth analysis and verification of the geopositioning accuracy were performed at a typical site with both flat and mountainous terrains.The rational polynomial coefficients(RPC) were refined through block adjustment with high accuracy GPS points as ground control points(GCP) and check points.Digital surface model(DSM) and digital ortho map(DOM) were automatically generated with the refined RPC,the planimetri...