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+ Leafy spurge dataset is a collection of images gathered by a drone of grasslands in western Montana. A drone surveyed a 150 hectare study area from 50m above the ground surface and the images it accquired were assembled into a contiguous orthomosaic using Drone Deploy software. Many scenes in the study area contain a weed plant, leafy spurge (*Euphorbia esula*). Botanists visited 1000 sites in the study area and gathered ground truth labels of leafy spurge presence/absence within 0.5 x 0.5 m plots. The position of these plots was referenced within the orthomosaic and these areas were cropped from the larger image. The resulting processed data are 1024 x 1024 pixel .tif files, though note the labelled areas correspond to the 39 x 39 pixel square (half-meter side length) found at the center of these crops. We include the context around the ground truth areas for experimental purposes.