Usually. there is some toponym with special characters (which are seldom seen) in the maps. Unless the map users have studied the knowledge about the toponym, it is difficult for them to identify the correct characters. Therefore, the mistakes are often followed and propagated by the map users. Recently, the digital map had been produced on large scale. When importing the Chinese characters, we usually have to create new characters for the special toponym in the computer character library. Owing to the imprudence and bizarrerie, we can't help suspecting the correctness and necessity. Consequently, we try to discuss the correctness of the character for the map toponym in the computer character packages, and apply' to provide a reference for the compilation of map toponym.