Integrating Remote Sensing and 3D Web-GIS Technology to Establishing Three-dimensional Urban Thermal Environment

Abstract

In recent years climate change has caused urban temperatures to increase According to research different surface coverage will contribute differently to the Urban Heat Island(UHI) effect However how to make residents living in cities easy to understand what kind of objects materials and types of buildings will affect the city temperature is the problem to be solved in this research But for the non-expert the representation of two-dimensional surface temperature maps and scientific data is not intuitive and difficult to understand Therefore in this case integrating 3D visualization of urban temperature into 3D Web-GIS is the appropriate solution First use Unmanned Aerial Vehicle(UAV) equipped with FLIR Duo Pro R and RedEdge-M camera to obtain data and use band co-registration method to transform each bands to the same image geometry respectively to improve the problem of band mis-registration then the subsequent aerotriangulation and modeling works can be performed In this program we will produce Digital Surface Model(DSM) thermal infrared(TIR) ortho image multispectral ortho image 3D Land Surface Temperature(LST) model and photo-realistic 3D Real model Next we use Object-Based Image Analysis (OBIA) technology to combine elevation information and multispectral data to perform land cover classification The classification results and the model produced in the previous step are imported into TerraExplorer TerraExplorer can classify mesh model by land cover classification data and give the attribute information into model so we can identify the material and temperature on the model In the final the application programming interface (API) provided by TerraExplorer was used for secondary development to create a customized 3D Web-GIS platform and providing users to operate analyze and browse urban thermal environment

Date of Award	2020
Original language	English
Supervisor	Jiann-Yeou Rau (Supervisor)