Research On Extraction And Analysis Of Spatial Feature Data Of Tangmo Shuikou Garden Under UAV Technology

In the process of the evolution of urban and rural spatial pattern,the traditional village form has been seriously eroded and destroyed.Shuikou garden,as an important garden form in traditional villages,also has some problems,such as lost elements and fuzzy spatial characteristics.Faced with these problems,many scholars began to study the Shuikou Garden in Huizhou in order to better understand and protect the spatial characteristics of Shuikou Garden.However,the research on the spatial characteristics of Shuikou garden is mainly based on ancient books,photos and mapping drawings,and lacks comprehensive and accurate spatial characteristics data for analysis.Therefore,it is of great value to apply UAV technology to the data collection of Shuikou garden spatial characteristics,and to comprehensively analyze the spatial characteristics of Shuikou garden by using rich data forms.Taking Shuikou Garden in Tangmo as an example,this thesis analyzes the spatial characteristics of Shuikou Garden by using the spatial data extracted from UAV remote sensing images.Firstly,the remote sensing image of the research area is obtained by using UAV.Then the Structure From Motion(Sf M)software is used to process the image data,and Digital Surface Model(DSM),digital orthographic map(DOM),point cloud and 3D model are obtained.Finally,the spatial characteristic data is extracted from the production data and used in the analysis and research of the spatial characteristics of Shuikou garden.The main results and conclusions are as follows:(1)The horizontal median error and vertical median error of spatial data produced by UAV remote sensing images are 0.034 m and 0.039 m,which meet the requirements of traditional village spatial data collection.(2)Based on the photogrammetry products produced by UAV,the spatial characteristics of Shuikou Garden can be well extracted by using spatial processing software.Among them,the slope and aspect characteristics of terrain are successfully extracted for DSM.Cloth simulation filter can better filter ground point clouds and building roof point clouds,and count the distance between point clouds.(3)The Shuikou Garden in Tangmo presents the spatial characteristics of connecting the past and the present.Shuikou Garden has a flat slope of 0 to 3,and the overall layout conforms to the natural terrain changes.Water space and buildings form the twists and turns of horizontal space and the changes of vertical space in Shuikou Garden.The layout of Shuikou forest conforms to the natural terrain,and the plane structure is composed of three forms: point,line and plane,which adds changes to the plane and vertical space of Shuikou garden.The research has realized the accurate collection of spatial feature data of Tangmo Shuikou Garden,and formed a process of data collection,processing and spatial feature extraction.The analysis results of spatial characteristics of Shuikou garden can provide reference for the protection of spatial characteristics of other cultural heritage and traditional villages.