我们对NASA与IBM联合开发的Prithvi-EO-2.0地理空间基础模型在利用卫星影像进行小型沙质岛屿海岸线提取方面的表现进行了初步评估。我们收集并标注了来自马尔代夫两个岛屿的225幅多光谱图像数据集，并公开发布该数据集；同时，我们在包含5至181幅图像的训练子集上对Prithvi模型的300M和600M参数版本进行了微调。实验结果表明，即使仅使用5幅训练图像，模型仍能取得优异性能（F1值为0.94，IoU值为0.79）。研究结果展示了Prithvi模型强大的迁移学习能力，凸显了此类模型在数据匮乏地区支持海岸带监测的巨大潜力。

We present an initial evaluation of NASA and IBM's Prithvi-EO-2.0 geospatial foundation model on shoreline delineation of small sandy islands using satellite images. We curated and labeled a dataset of 225 multispectral images of two Maldivian islands, which we publicly release, and fine-tuned both the 300M and 600M parameter versions of Prithvi on training subsets ranging from 5 to 181 images. Our experiments show that even with as few as 5 training images, the models achieve high performance (F1 of 0.94, IoU of 0.79). Our results demonstrate the strong transfer learning capability of Prithvi, underscoring the potential of such models to support coastal monitoring in data-poor regions.