Device-dependency of color introduces such problems as color distortion and error geographic information transmission when electronic maps represent in multiple-medias.Based on the analysis of the characteristics of map gamut

a gamut mapping method based on SOM(Self-Organizing Maps) neural network is proposed.In this method

the weight factor of map color is considered and the neighborhood function

which is anisotropic in map color

is modified.The experiments indicate that our proposed method performs better than the ICC(International Color Consortium) perceptual intent and absolute colorimetric intent on keeping overall color difference.This method can also improve the reproduction accuracy of electronic map colors.