Implementatıon And Web-Based Vısualızatıon Of 3d Cıty Models

Abstract

3D city models have become crucial for a better city management, and can be used for various purposes such as disaster management, navigation, solar potential computation and planning simulations. 3D city models are not only visual models, and thematic queries and analyzes can be performed with the help of semantic data. They can be produced using different data sources and methods. In this study, basemaps and large-format aerial images, which are produced in accordance with the regulations of large-scale map production in Turkey (called BOHYY) have been used to develop a workflow for semi-automatic 3D city model generation. The aim of this study is to generate a 3d city model from existing aerial photogrammetric datasets without any additional data acquisition or costly manual processing. During the prodution, open-source software or other tools with free educational/research licences is preferred. As a result, a 3D city model has been generated with semi-automatic methods at LoD2 of CityGML using the data of study area near Çesme / Izmir. The generated model is automatically textured and visualized on the web along with the attribute information and digital terrain model. The model is published on the web at www.cesme3d.com. The problems encountered throughout the study and approaches to solve them are presented here.