Shih believes that California legislators demanded only 1: 24,000 maps because they understood the practical difficulties in tracing faults, and only intended these maps to be used as a general reference. More important was the requirement that construction firms be responsible for detailed onsite surveys before starting to build.
石瑞銓認為，美國要求斷層圖畫在二萬四千分之一的地圖上，因為他們知道畫斷層線有實際的困難，在適度範圍內可以畫斷層帶提供人們參考，但更重要的是工程開發單位本身要更有責任感，在基地開挖前，必須進行詳細的調查。