Multi-source remote sensing images are important for wetland mapping and change detection. However,the commercial high-spatial-resolution satellite images currently used can only reproduce the wetland landscape pattern for nearly 20 years. The declassified CORONA KH-4B image acquired by American spy satellite in the 1960s and early 1970s was used for wetland mapping in Xixi Wetland in Hangzhou, China. The object-oriented classification method was used to classify wetland objects automatically, and wetland l...