Update README.md

README.md

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+
 # NestEO: Modular and Hierarchical EO Dataset Framework
 
 NestEO is a hierarchical, resolution-aligned, UTM-based nested grid dataset framework supporting general-purpose, multi-scale multimodal Earth Observation workflows. Built from diverse EO sources and enriched with metadata for landcover, climate zones, and population, it enables scalable, representative and progressive sampling for AI4EO.
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 **Grid Levels**: 120000m, 12000m, 2400m, 1200m, 600m, 300m, 150m  
 **Grid Metadata**: ESA WorldCover proportions, GHSL, Köppen Climate  
 **Current Datasets**: Wyvren Hyperspectral, Satellogic Newsat  
+**Zones**: UTM 1N–60N, 1S–60S and Polar North/South
+**Formats**: Parquet, GeoParquet, Zarr (planned)
 **License**: CC-BY-4.0  
 **More Info**: See [paper](link), [GitHub](https://github.com/mbzuai-oryx/NestEO).  
 
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 └── versions/               # Information about snapshots for version control
 ```
 
+## Dataset Structure
+- Each tile includes a unique `tile_id`, `super_id`, and spatial geometry.
+- Grouped by zone directories: `grid_2400m/grid_37N_2400.parquet`
+
+
 **How to Use**  
 
 * Load a grid from grids/ (e.g., grid_1200m.parquet).  
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 This is an initial prototype release. Some EO source folders are partially populated, and ongoing ingestion is underway. Metadata filtering and source-pairing are fully supported.
 
+**Limitations**
+- Current version includes only structural grid and metadata, along with a few EO data sources
+- Further EO content layers (imagery, land cover, auxillary layers etc.) to be added in coming updates
 
 **Contributing**  
 
@@ -45,3 +56,5 @@ We welcome contributions on:
 * Benchmarks and model evaluations
 
 
+## Citation
+TBD – upon official release.