Update README.md

# California Burned Areas Dataset

## Dataset description

The dataset contains images taken from Sentinel-2, which contains 12 channels, collected after and before a wildfire event. The ground truths of the burned areas are provided by the California Department of Forestry and Fire protection and they are mapped on the images.

README.md

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 ---
 license: openrail
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+task_categories:
+- image-segmentation
+pretty_name: California Burned Areas
+size_categories:
+- n<1K
+---