Study on Progressive Approach to Graphic Generalization of Linear Feature

The progressive graphic generalization approach of linear feature is given in this paper, which comprises the progressive geometric approach based on triangle, and the another one based on graphic basic unit "meander". This approach is better than Douglas generalization method. It can control the self intersection of line, makes map scale become continuous, not be dispersed, can be used in geographic information system. The effect is better in the case of application of characteristic points of a line.