Research on Unit Conversion of Ancient Architectural Design

The questions caused by the disappearance of old chi and incompatibility between ancient size and computer drafting are analyzed.The relationship between the dimensions in ancient dynasty and the metric system nowadays is introduced,and a method is put forward by combining ancient size with computer drafting.An example of dealing with Caifen modular system in the Song Dynasty and Doukou modular system in Qing Dynasty by computer drafting is given.Thus the complex artificial conversion is avoided,and design efficiency is improved obviously,which does more good for bring out young people in ancient architectural design.