In this paper,some principles of automated generalization on the discontinous area phenomena-were discussed,followed by the strategies of auto-generalization.Furthermore,the authors expounded the algorithms of every operation of the figure auto-generalizatio of areapatch,i.e.,selection/elimination,simplification,exaggeration,displacement,and aggregation.Finally,the implementation methods of the above algorithms,and the operational workflows of a few cartographic feature,were reported.