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This dataset contains geospatially referenced polygons representing the boundaries of all ground-mounted solar arrays within the Chesapeake Bay watershed as of September 1, 2020. Data were created in collaboration between the Center for Conservation Innovation at Defenders of Wildlife and the Chesapeake Conservancy. ### Data creation Data were automatically generated from Sentinel-2 satellite data using a [U-Net][1] model developed by Defenders of Wildlife trained to segment solar arrays from Sentinel-2 multispectral imagery. The model was trained using 395 hand-digitized features provided by the Chesapeake Conservancy, and 663 features hand-digitized by Defenders of Wildlife. Predictions were run on a composite image made from Sentinel-2 images collected between June and September 2020. ### Spatial coverage The Chesapeake Bay watershed covers parts of New York, Pennsylvania, and Virginia, as well as all of Maryland and Delaware. These data can be visualized over the satellite imagery from which they were generated using a public Google Earth Engine [web application][2]. [1]: https://link.springer.com/chapter/10.1007/978-3-319-24574-4_28 [2]: https://defendersofwildlifegis.users.earthengine.app/view/chesapeakesolar