Add extraction instructions

README.md

@@ -25,6 +25,23 @@ The dataset is curated from various sources, including the Copernicus European M
 ---------
 ![Dataset sample](assets/sample.png)
 
+## Dataset Preparation
+
+The dataset has been compressed into segmentented tarballs for ease of use within Git LFS (that is, tar > gzip > split).
+To revert the process into files and directories follow these steps:
+
+```console
+$ git clone https://huggingface.co/datasets/links-ads/wildfires-cems
+$ cd wildfires-ems
+# revert the multipart compression: merge first, then untar
+$ cat data/train/train.tar.* | tar -xvf - -i
+$ cat data/test/test.tar.* | tar -xvf - -i
+$ cat data/val/val.tar.* | tar -xvf - -i
+```
+
+It is very likely that the extracted files will retain the internal directory structure, making the `train/val/test` directories useless.
+Adapt the output structure as you see fit, the original structure is shown below.
+
 ## Dataset Structure
 
 The main dataset used in the paper comprises the following inputs:
@@ -93,4 +110,4 @@ CC-BY-4.0 [https://creativecommons.org/licenses/by/4.0/](https://creativecommons
 
 ### Contributions
 - Luca Barco (luca.barco@linksfoundation.com)
-- Edoardo Arnaudo (edoardo.arnaudo@polito.it | linksfoundation.com)
+- Edoardo Arnaudo (edoardo.arnaudo@polito.it | linksfoundation.com)