Three-Dimensional Research On The Construction Of Digital Information Model For The Garden Of Jian Xinzhai,Fragrent Hill Jingyi Gaeden,Beijing

"Three Hills and Five Gardens" is an outstanding representative of Chinese classical royal gardens,and is also an important research field for exploring history and inheriting cultural values.Fragrant Hill Jingyi Garden occupies one hill and one garden among the "Three Hills and Five Gardens",which has reflected its special cultural value in different stages of historical development.In recent years,the case study and reconstruction project of Xiangshan Jingyi Garden "28 Scenes" and "2Scenes of Bieyuan" are gradually carried out.Jianxin Zhai,one of the "2 Scenes of Bieyuan",is the only garden-within-garden in Jingyi Garden with the characteristics of Jiangnan literati Garden.It is well preserved and has outstanding cultural value,which is worthy of further study and excavation.Nowadays,the rapid development of3 D digital technology provides a new perspective and thinking for the research and protection of Jianxinzhai Garden.First of all,in the first chapter of the introduction,the relevant research status at home and abroad is summarized,and the deficiencies in the construction of 3D digital information model of classical gardens are proposed.The second chapter summarizes the theoretical origin of information model and analyzes the practical cases of information model construction at home and abroad.The third chapter discusses the system and method of constructing 3D digital information model of Jianxinzhai garden by using 3D digital technology.The information model includes entity information,spatial information and attribute information of garden,and the construction steps include three aspects: digital collection of garden data,fine classification and processing of garden data,and information protection and management of garden elements.In the fourth chapter,a detailed demonstration on the digital collection of Jianxinzhai Garden is carried out.Based on the comprehensive consideration of working environment,conditions,efficiency and other factors,the 3D data of Jianxinzhai Garden is obtained by using the ground 3D laser scanner,and the pre-processing and registration are carried out.Finally,the point cloud model and 2D mapping of the whole garden of Jianxinzhai are obtained.It proves the feasibility of this technique in obtaining the entity information data of classical gardens.In chapter five,the author demonstrates in detail the classification processing of the data of Jianxinzhai garden,and puts forward the classification system of the elements required by the construction of the information model of classical garden by integrating the theories of landscape architecture,surveying and mapping practice and cultural heritage.The point cloud filtering and classification method are applied to Jianxinzhai,and the classification method of point cloud data in garden environment is explored,which proves the feasibility of the above classification system.The sixth chapter discusses in detail the information protection and management of Jianxinzhai garden elements.Based on the results of digital collection and fine classification,the management system of Jianxinzhai garden is constructed.The BIM technology and GIS technology are respectively used to carry out systematic management of the single buildings and garden environment in Jianxinzhai.This part proves that the construction of the information model of Beijing royal gardens needs the comprehensive application of BIM and GIS technology,and the digital management of cultural relics has become an inevitable development trend.Chapter seven summarizes the conclusion of the whole paper.This paper put forward for the first time see the mind-heart garden three dimensional digital information model,the information model contains botanical garden all aspects of the information,is a garden entity information,garden,garden attribute information in the integration of spatial information database,the file is point cloud model,building information model,space model,text and image information,with functions of retrieval,visual display,etc.In the above data,the entity information data is mainly collected by 3D laser scanner and classified by LIDAR processing software.In the process,attention should be paid to the collection and processing of classical garden terrain environment and rockery space to improve accuracy and efficiency.Spatial information and attribute information data are mainly collected,summarized and sorted by traditional methods.In processing,attention should be paid to the matching degree and comprehensiveness of text and picture information.The completed information model construction logic and method are reliable,and it is expected to achieve the visual input,management,query and display effect of multi-source information,which has a relatively large application prospect in the research and protection of Beijing royal gardens.We believe that with the more mature emerging technologies and platforms in the future,the correlation between the multi-source information data in the three-dimensional digital information model of gardens will be further improved to achieve better retrieval,interaction and other functions.