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---
license: other
license_name: slab-license
license_link: LICENSE
tags:
- aigc
- city
- synthetic
pretty_name: CityTopia
size_categories:
- 10B<n<100B
---
# The CityTopia Dataset
from **[CityDreamer4D: Compositional Generative Model of Unbounded 4D Cities](https://arxiv.org/abs/2501.08983)**
[Haozhe Xie](https://haozhexie.com),
[Zhaoxi Chen](https://frozenburning.github.io/),
[Fangzhou Hong](https://hongfz16.github.io/),
[Ziwei Liu](https://liuziwei7.github.io/)
from [S-Lab, Nanyang Technological University](https://www.mmlab-ntu.com/)
**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](https://gateway.infinitescript.com/s/CityTopia).
#### 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. |