Abstract: We propose an improved algorithm of combination(aggregation and amalgamation) of parcels on the point of computational geometry.Aggregation is done with the concept of buffer,by which the so-called bridge can be merged efficiently,while amalgamation is done using skeleton.The process of amalgamation is influenced by both the curves shared by parcels and the types of the parcels.After being splitted by skeleton,the chosen parcel derives a set of polygons to be combined by the neighbor parcels one by one.This algorithm keeps the natural shape of parcels,and has taken the amount of the father level of shown parcels into account.