Evaluating the Efficacy of Sentinel-2 versus Aerial Imagery in Serrated Tussock Classification
- URL: http://arxiv.org/abs/2512.11267v1
- Date: Fri, 12 Dec 2025 04:10:44 GMT
- Title: Evaluating the Efficacy of Sentinel-2 versus Aerial Imagery in Serrated Tussock Classification
- Authors: Rezwana Sultana, Manzur Murshed, Kathryn Sheffield, Singarayer Florentine, Tsz-Kwan Lee, Shyh Wei Teng,
- Abstract summary: Serrated tussock (textitNassella trichotoma) is a highly competitive invasive grass species that disrupts native grasslands, reduces pasture productivity, and increases land management costs.<n>Current ground surveys and subsequent management practices are effective at small scales, but they are not feasible for landscape-scale monitoring.<n>Satellite-based remote sensing provides a more cost-effective and scalable alternative, though often with lower spatial resolution.
- Score: 1.7975159705384043
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: Invasive species pose major global threats to ecosystems and agriculture. Serrated tussock (\textit{Nassella trichotoma}) is a highly competitive invasive grass species that disrupts native grasslands, reduces pasture productivity, and increases land management costs. In Victoria, Australia, it presents a major challenge due to its aggressive spread and ecological impact. While current ground surveys and subsequent management practices are effective at small scales, they are not feasible for landscape-scale monitoring. Although aerial imagery offers high spatial resolution suitable for detailed classification, its high cost limits scalability. Satellite-based remote sensing provides a more cost-effective and scalable alternative, though often with lower spatial resolution. This study evaluates whether multi-temporal Sentinel-2 imagery, despite its lower spatial resolution, can provide a comparable and cost-effective alternative for landscape-scale monitoring of serrated tussock by leveraging its higher spectral resolution and seasonal phenological information. A total of eleven models have been developed using various combinations of spectral bands, texture features, vegetation indices, and seasonal data. Using a random forest classifier, the best-performing Sentinel-2 model (M76*) has achieved an Overall Accuracy (OA) of 68\% and an Overall Kappa (OK) of 0.55, slightly outperforming the best-performing aerial imaging model's OA of 67\% and OK of 0.52 on the same dataset. These findings highlight the potential of multi-seasonal feature-enhanced satellite-based models for scalable invasive species classification.
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