Update README.md

README.md

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-## Preprocessed SelvaBox Dataset
+## SelvaBox: A high-resolution dataset for tropical tree
 
-This is the version of the SelvaBox dataset that has been pre-processed and presented in our SelvaBox paper.
+This is the version of the SelvaBox dataset that has been pre-processed and presented in our SelvaBox paper.
+
+The dataset is made of 14 rasters resampled at 4.5 cm GSD, from three different countries: Brazil, Ecuador and Panama. It comprises over 83 000 human bounding box annotations for tropical tree crowns in dense canopies.
+
+Training tiles are 3555x3555 pixels, while validation and test tiles are 1777x1777 pixels, equivalent to 80x80 meters spatial extent. There is 50% overlap between train and validation tiles, and 75% between test tiles (to make sure the largets trees of 50+ meters in diameter will fit entirely in at least one tile).
+
+Link to our paper will come soon.