Digitization of topographical maps is significant for creating geographical information system. In this paper

object-oriented approach is introduced into of segmentation scanned map. The procedure is described as follows. First

linear elements and area elements are separated. Then they are partitioned into image objects which are basic cells to classify map features

not single pixels. And a set of features combining color

shape and topological are extracted from each object. Based on the features

a classification criterion is employed to perform the map segmentation. The proposed method overcomes aliasing and false colors induced by the scanning process. The results seem coherent

with name of the “salt and pepper” effects.