또, 『오산지』에는 폐성을 이서산성이라 전하고 있으며, 『대동지지』 청도 고읍 조에서는 폐성이 형산현이라 하였다.
In addition, Osanji indicated the Pyeseong Fortress to be Iseosanseong Fortress. Regional Geography of Korea (Daedong jiji) recorded that Pyeseong fortress was located in Hyeongsan-hyeon.