The CityTopia Dataset

from CityDreamer4D: Compositional Generative Model of Unbounded 4D Cities

Haozhe Xie, Zhaoxi Chen, Fangzhou Hong, Ziwei Liu from S-Lab, Nanyang Technological University

TL; DR: CityTopia is the largest synthetic dataset for 3D cities with annotations, offering high-fidelity scenes generated using 3D assets from the Unreal Engine 5 CitySample project.

More download options, including Google Drive and Baidu Drive, are available here.

Features

• High Fidelity: Created using cutting-edge Unreal Engine 5 assets for realistic urban scenes.
• Diverse Annotations: Includes semantic and instance annotations at 1080p resolution.
• Versatile Renders: Contains day and night scenes in multiple resolutions.
• Customizability: Provides source files for city generation via Houdini, enabling custom dataset creation.

Files and Descriptions

File Name	Description	Size
CityTopia-Annotations-1080p.zip	3D semantic and instance annotations.	1.2 GB
CityTopia-RGB-Day-540p.zip	Rendered RGB images of daytime scenes.	7.1 GB
CityTopia-RGB-Night-540p.zip	Rendered RGB images of nighttime scenes.	2.8 GB
CityTopia-RGB-Day-1080p.zip	High-resolution rendered RGB images of daytime scenes.	50 GB
CityTopia-RGB-Night-1080p.zip	High-resolution rendered RGB images of nighttime scenes.	20 GB
CityTopia-HoudiniFiles.zip	Houdini source code for generating virtual cities, enabling customization.	0.4 GB

Recommendations

• Use CityTopia-Annotations-1080p.zip for all semantic and instance labeling needs.
• For lower resolution, opt for CityTopia-RGB-Day-540p.zip and CityTopia-RGB-Night-540p.zip.
• Select 1080p files (CityTopia-RGB-Day-1080p.zip, CityTopia-RGB-Night-1080p.zip) only if high-resolution images are necessary.
• Use CityTopia-HoudiniFiles.zip if custom 3D cities are required for advanced experiments.