The spectral and structural bands generated from Pix4d for the classification analyses.

The spectral and structural bands generated from Pix4d for the classification analyses.

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Detecting newly established invasive plants is key to prevent further spread. Traditional field surveys are challenging and often insufficient to identify the presence and extent of invasions. This is particularly true for wetland ecosystems because of difficult access, and because floating and submergent plants may go undetected in the understory...

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Context 1
... final multispectral + structural/textural stacks consisted of the four spectral bands, NDVI, DSM or CHM, and rugosity (of either surface or canopy height) at each spatial resolution. We also created multispectral-only stacks (spectral bands + NDVI) to compare classification accuracies with those from the multispectral + structural datasets (Tables 1 and 2). Table 2. ...
Context 2
... floating EFB + Lily spp. as separate classes due to their expected differences in spectral reflectance ( Figure S1), as well as both species' prevalence in the wetland. However, we found lower accuracies with these classes separated than when we combined both floating classes into a single Floating class (Table S1 vs. Table 4). We report the full results of this analysis in the Supplementary Information. ...
Context 3
... floating EFB + Lily spp. as separate classes due to their expected differences in spectral reflectance ( Figure S1), as well as both species' prevalence in the wetland. However, we found lower accuracies with these classes separated than when we combined both floating classes into a single Floating class (Table S1 vs. Table 4). We report the full results of this analysis in the Supplementary Information. ...
Context 4
... boxes represent areas with varying degrees of segmentation, where OS indicates "Over-Segmented," RS indicates "Realistically-Segmented," and US indicates "Under-segmented. Table S1: Confusion matrix for the 11 cm 'Multispectral + DSM + Rugosity' model on the disaggregated vegetation classes recorded in the field: floating EFB + Lily spp., floating Duckweed spp., Submergent, and Emergent vegetation. Reference data are actual recorded classes from the field as well as reference points determined from the imagery and predicted classes at test points were generated from the random forest model. ...