| Summary: | A new ground truth dataset generated with high-accuracy Global Navigation Satellite Systems (GNSS) positional data of the invasive reed <i>Phragmites australis</i> subsp. <i>australis</i> within Îles-de-Boucherville National Park (Quebec, Canada) is described. The park is one of five study sites for the Canadian Airborne Biodiversity Observatory (CABO) and has stands of invasive <i>P. australis</i> spread throughout the park. Previously, within the context of CABO, no ground truth data had been collected within the park consolidating the locations of <i>P. australis</i>. This dataset was collected to serve as training and validation data for CABO airborne hyperspectral imagery acquired in 2019 to assist with the detection and mapping of <i>P. australis</i>. The locations of the ground truth points were found to be accurate within one pixel of the hyperspectral imagery. Overall, 320 ground truth points were collected, representing 158 locations where <i>P. australis</i> was present and 162 locations where it was absent. Auxiliary data includes field photographs and digitized field notes that provide context for each point.
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