---
dataset_info:
  features:
  - name: t1_image
    dtype: image
  - name: t2_image
    dtype: image
  - name: t1_mask
    dtype: image
  - name: t2_mask
    dtype: image
  - name: change_mask
    dtype: image
  - name: image_name
    dtype: string
  splits:
  - name: train
    num_bytes: 24925879278
    num_examples: 27000
  download_size: 24928523235
  dataset_size: 24925879278
configs:
- config_name: default
  data_files:
  - split: train
    path: data/train-*
license: cc-by-nc-sa-4.0

extra_gated_prompt: "This model is released for research and educational purposes only. Access to the model is granted upon agreement to use it ethically, responsibly, and in compliance with the stated license (CC BY-NC 4.0)."
extra_gated_fields:
  Full Name: text
  Institution / Organization: text
  Position / Title: text
  Company / School: text
  Country: country
  I want to use this model for:
    type: select
    options: 
      - Research
      - Education
      - label: Other
        value: other
  I agree to use this model for non-commercial use ONLY: checkbox
  I confirm I will not use this model to cause harm to human subjects or the environment: checkbox

---

# Dataset Card for Changen2-S9-27k

<!-- Provide a quick summary of the dataset. -->
Changen2-S9-27k (an urban land-use/landcover change dataset with 27k pairs and 38 change types), 0.25-0.5m spatial resolution, RGB bands

Mask information (following OpenEarthMap dataset):

Background = 0

Bareland = 1

Rangeland = 2

DevelopedSpace = 3

Road = 4

Tree = 5

Water = 6

AgricultureLand = 7

Building = 8

### Dataset Sources

<!-- Provide the basic links for the dataset. -->

- **Repository:** https://github.com/Z-Zheng/pytorch-change-models
- **Paper:** https://ieeexplore.ieee.org/document/10713915


## Citation

<!-- If there is a paper or blog post introducing the dataset, the APA and Bibtex information for that should go in this section. -->

**BibTeX:**
```text
@article{zheng_changen2,
  author={Zheng, Zhuo and Ermon, Stefano and Kim, Dongjun and Zhang, Liangpei and Zhong, Yanfei},
  journal={IEEE Transactions on Pattern Analysis and Machine Intelligence}, 
  title={Changen2: Multi-Temporal Remote Sensing Generative Change Foundation Model}, 
  year={2025},
  volume={47},
  number={2},
  pages={725-741},
  doi={10.1109/TPAMI.2024.3475824}
}
``````