Publications

We present Fields of The World (FTW) – a novel ML benchmark dataset for agricultural field instance segmentation spanning 24 countries on four continents (Europe, Africa, Asia, and South America). FTW is an order of magnitude larger than previous datasets with 70,462 samples, each containing instance and semantic segmentation masks paired with multi-date, multi-spectral Sentinel-2 satellite images.

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We train and validate semantic segmentation models on historical aerial imagery from 1943 and 1972 for identifing trees, omuti (homesteads), and waterholes. These features are important for understanding how northern Namibia has changed over time. We observe average F1 scores of 0.661 and 0.755 for the 1943 and 1972 imagery respectively. Finally, we run our 1972 model over 5,000 square kilometers to get a first look at the historical population distribution in this area.

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We propose a simple method for extracting stronger labels from weak cropland labels and an unsupervised segmentation of satellite imagery. We show, in a scenario in Kenya where we only have 33 human-annotated labels, that adding strong labels mined by our method increases the F1 score for the cropland category from 0.53 (without mining) to 0.84.

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We introduce a novel remote sensing dataset for evaluating a model’s ability to learn long-range spatial dependencies in aerial imagery by performing road extraction while containing large gaps occluded by tree canopy.

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We introduce SSL4EO-L, the first ever dataset designed for self-supervised learning for Earth Observation for the Landsat family of satellites.

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