## 5 User Notes  
Users should be sure to note the \"Solution Status\" field of the dataset, as solutions of \"FLOAT\" and \"FIX\" may have implications on the overall accuracy of the collected location. While both \"FLOAT\" and \"FIX\" solution statuses indicated that base corrections are included and positioning is relative to the determined base coordinates, \"FLOAT\" means that the integer ambiguity is not resolved, while \"FIX\" means that the integer ambiguity is resolved. Precision in float mode is typically at the sub-meter level, while precision in fix mode is at the centimeter level. Points collected in dense vegetation, such as standing in a developed _Phragmites_ stand that could measure over 2 m in height, are likely to have lower accuracy. This can be attributed to the fact that such dense vegetation restricted the view of the sky, and therefore restricted the ability of the Reach RS+ to see and acquire sufficient satellites to produce lower errors. To improve the positional accuracy of the ground truth points, a multi-band receiver with incoming corrections over a shorter baseline is recommended. For the Reach RS+ specifically, a local base station (< 10 km baseline) in addition to the incoming NTRIP corrections would be required for higher accuracy. Due to logistical constraints, it was not possible to remeasure the 320 points in order to recheck them for accuracy. Additionally, there are no previously established geodetic monuments within the park that could serve as a reference point. Because the Reach RS+ unit had been previously assessed for accuracy using a Natural Resources Canada High Precision 3D Geodetic Network station (see Section 3.3), the 320 points were collected in the field with confidence, and their approximate accuracy exceeds the requirements of the project under which they were acquired. Figure 7: (**A**) A mosaic of the four CASI-1500 flight lines acquired over lies-de-Boucherville National Park on July 8, 2019 (Projection: NAD83(CSSR)v7, EPSG:8254). The HSI are displayed as a true color RGB composite: 650 nm/548 nm/442 nm. The red rectangle shows the location of subset (**B**), which illustrates the appearance of _Phragmites_ stands in the HSI (red arrows) and the location, as an example, of one of the ground truth points (FID 201) collected within a _Phragmites_ stand. (**C**) shows a closeup of the HSI with individual pixels visible, and a 2.25 m buffer drawn around FID 201 to demonstrate that all pixels within the buffer are part of the _Phragmites_ stand. (**D**) shows the corresponding field photograph for FID 201 to give context to the measured location. The field note information shown in Figure 2 is in a format that can be joined to the attribute table of the.shp file in a GIS. This would allow the user to have the attribute table contain a complete set of descriptions for each point. There is one missing field photograph for the point FID-265. However, a brief description of the immediate area was noted within the auxiliary field notes file. Conceptualization, M.K. and K.E. ; methodology, M.K. and K.E. ; formal analysis, K.E. ; data curation, K.E. ; writing--original draft preparation, K.E. ; writing--review and editing, M.K. and K.E. All authors have read and agreed to the published version of the manuscript. This research was funded by a Natural Sciences and Engineering Research Council (NSERC) Discovery Frontiers grant that supported the Canadian Airborne Biodiversity Observatory (CABO). Additional funding was provided by the McGill Department of Geography Rathlyn Fellowship in Geography (to [PERSON]). The APC was funded by an NSERC Discovery Grant (to [PERSON]). The dataset is available for download from [[http://doi.org/10.5281/zenodo.4504922](http://doi.org/10.5281/zenodo.4504922)]([http://doi.org/10.5281/zenodo.4504922](http://doi.org/10.5281/zenodo.4504922)) (accessed on 13 March 2021). We would like to acknowledge the SEPAQ team at Ilse-de-Boucherville National Park, especially [PERSON], for their logistical support of the data collection campaign.