Add README

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README.md

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+---
+license: CC-BY-SA-4.0
+pretty_name: "TerraMesh"
+dataset info:
+- size: "~14TB (compressed)"
+- samples: "≈9.1M train / 89k val"
+- patch size: "264x264 pixel"
+- temporal coverage: "2017→2024"
+---
 # TerraMesh
 
-Date release end of June!
+> **A planetary‑scale, multimodal analysis‑ready dataset for Earth‑Observation foundation models.**
 
+
+**TerraMesh** merges data from **Sentinel‑1 SAR, Sentinel‑2 optical, Copernicus DEM, NDVI and land‑cover** sources into more than **9 million co‑registered patches** ready for large‑scale representation learning. Compared with earlier public corpora it offers **>20×** more pixel values and truly global, multi‑season coverage.
+
+> ** Dataset release – End of June. **
+
+---
+
+## Key features
+
+| Aspect     | Value                                                                                                                          |
+| ---------- |--------------------------------------------------------------------------------------------------------------------------------|
+| Modalities | S‑2 L1C (13 bands), S‑2 L2A (12 bands), S‑2 RGB (3 bands), S‑1 GRD (VV, VH), S‑1 RTC (VV, VH), NDVI, Copernicus DEM, ESRI LULC |
+| Samples    | **9 089 536** train · **89 088** val                                                                                           |
+| Patch size | 264 × 264 pixel (10 m grid)                                                                                                    |
+| Years      | 2017 – 2024 (peak 2019 ‑ 2023)                                                                                                 |
+| License    | CC‑BY‑SA‑4.0                                                                                                                   |
+
+---
+
+## Dataset organisation
+
+The archive ships two top‑level splits `train/` and `val/`, each holding one folder per modality. More details with the dataset release end of June.
+
+---
+
+## Global coverage & class distribution
+
+![one_degree_map.png](assets%2Fone_degree_map.png)![timestamps.png](assets%2Ftimestamps.png)
+
+---
+
+## Performance evaluation
+
+[radar.pdf](assets%2Fradar.pdf)
+
+
+---
+
+## Citation
+
+If you use TerraMesh, please cite:
+
+```bibtex
+@article{blumenstiel2025terramesh,
+  title={Terramesh: A planetary mosaic of multimodal earth observation data},
+  author={Blumenstiel, Benedikt and Fraccaro, Paolo and Marsocci, Valerio and Jakubik, Johannes and Maurogiovanni, Stefano and Czerkawski, Mikolaj and Sedona, Rocco and Cavallaro, Gabriele and Brunschwiler, Thomas and Bernabe-Moreno, Juan and others},
+  journal={Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) Workshops},
+  year={2025}
+}
+```
+
+---
+
+## License
+
+TerraMesh is released under the **Creative Commons Attribution‑ShareAlike 4.0 (CC‑BY‑SA‑4.0)** license.
+
+---
+
+## Acknowledgements
+
+TerraMesh is part of the **FAST‑EO** project funded by the European Space Agency Φ‑Lab (contract #4000143501/23/I‑DT) and builds upon SSL4EO‑S12 and MajorTOM‑Core datasets.
+
+---