Update README.md

README.md

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 # MCTED - Mars CTX Terrain-Elevation Dataset
 
+[**Dataset repository**]() | [**arXiv article**]()
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+<img src="./.images/dataset_samples.png" alt="Dataset samples" style="width:70%;"/>
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 ## Overview
 **MCTED** is a machine-learning-ready dataset of optical images of the surface of Mars, paired with their corresponding digital elevation models.
 It was created using an extensive repository of orthoimage-DEM pairs with the NASA Ames Stereo Pipeline using the Mars Reconneissance Orbiter's CTX instrument imagery by
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 This dataset is fully open-source, with all data and code used for it's generation available publicly.
 
-[**Dataset repository**]() | [**arXiv article**]()
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 ## Dataset contents
 The dataset contains in total **80,898** samples, divided into two splits:
 |Training|Validation|