Update README.md

README.md

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 | [Core-S2L2A](https://huggingface.co/datasets/Major-TOM/Core-S2L2A) | Sentinel-2 Level 2A | 2,245,886 | Multi-Spectral | General-Purpose Global (about 23 TB) |
 | [Core-S2L1C](https://huggingface.co/datasets/Major-TOM/Core-S2L1C) | Sentinel-2 Level 1C | 2,245,886 | Multi-Spectral | General-Purpose Global (about 23 TB) |
 | [Core-S1RTC](https://huggingface.co/datasets/Major-TOM/Core-S1RTC) | Sentinel-1 RTC | 1,469,955 | SAR | General-Purpose Global (about 16 TB) |
+| [Core-DEM](https://huggingface.co/datasets/Major-TOM/Core-DEM) | Copernicus DEM 30 | 1,837,843 | Digital Surface Model (DSM) | General-Purpose Global (about 1 TB) |
 
 ## 📌 Open Access Manuscript
 [![arxiv](https://img.shields.io/badge/Open_Access-arxiv:2402.12095-b31b1b)](https://arxiv.org/abs/2402.12095/)