In this study, the Database information on the cultural remains was prepared in order to find out why the city site was formed in the archaeological city states during Warring State period and Qin and Han dynasties. The construction of database on the ancient remains shall be first made in order to analyze the relation with the surrounding environments.
Based on that information, the distribution maps for each period, region, and size were prepared and the degree of inconsistence between the size and the conventional grades in the local counties and prefectures was checked.
To solve the problem, the method of considering the relation between the size of city site and the space where the city site was constructed, which has been discussed in close relation with the conventional grade in the existing counties and prefectures was suggested. The geological information has been prepared focusing on
the area around Henan Prefecture where the ancient city site were concentrated in the area of lower and middle stream of Yellow river.
As for the geological information, the contour with 20-meter distance was acquired using DEM(Digital Elevation Model)and thegradient(slope) was made using this information. Through this information, the place where the ancient city sites were closely concentrated was found to be around the rivers. When it was overlaid with the boundary of counties constructed during the Qin and Han dynasties, the ancient city sites were found to closely exist
around the rivers, thus showing that they are closely related with the boundary of counties. At this time, the size of the ancient city sites had the size equivalent to that of a fortress lacated in the northern area.