GPR탐사를 통해 본 경주 월성의 유적 분포현황 연구

Abstract

Previous studies on Wolseong fortress have focused on capital system of Silla Dynasty. And the analysis of the excavation in and around Wolseong moat has helped to facilitate the recreation of what Wolseong fortress must have looked like at the time. Since the report on the Geographical Survey of Wolseong fortress was published and GPR survey in Wolseong fortress was executed as a trial test in 2004, the academic interest of it have moved forward into the internal area of the fortress. From such context, the preliminary research on the fortress including geophysical survey had been commenced. GPR survey had been conducted for a year starting from March in 2007. A principal purpose of the 3D GPR survey was to provide the overviewing subsurface images of the entire area of Wolseong fortress. In order to obtain 3D GPR data, dense profile lines were laid in grid-form. Its total area for the survey was 112,535m². Depth slice was applied to analyse each level to examine how the layers of the remains had been changed and overlapped over times. In addition, slice overlay analysis methodology was used to gather all these reflections by certain depth each. Isolated surface visualization, which is one of 3D analysis methods, was used for the deeper understanding and better interpretation of the remains. GPR survey has confirmed that there were building sites which can characterise different archaeological features. Their features can be divided into 14 different groups. Three interesting areas which display huge public building arrangement have been found in Zone 2 of the far west, Zone 9 in the middle, and Zone 14 in the far east. It is recognized that such areas must have important public functions. This research has displayed that 3D GPR survey can be effective for the vast area of archaeological remains and slice overlay images can provide clearer image with high contrast for the buried objects and remains underneath of the site.