This paper has extended and improved the method of distance-preserving projection which substitutes an estimated geodesic distance for the conventional Euclidean distance.It can nuroll the data of nonlinear surface correctly and preserves exact distances of each data point to its nearest neighbor point and to some other near neighbors.In order to choose a suitable neighborhood size effectively

the P-ISOMAP algorithm which is much less sensitive to the neighborhood size is used.Contrasted with the original method and ISOMAP and other methods

this paper can reduce dimensionality and visualize more effectively.For classification

this paper develops new classification techniques.The experiments prove that the method has taken the excellent effect in visualization

dimensionality reduction and classification.