Fig. 2: Orthomosaic and principal components (PCs). | Communications Earth & Environment

Fig. 2: Orthomosaic and principal components (PCs).

From: Hydrothermal weakening and slope instability at Vulcano (Italy) analyzed using drones and in-situ strength measurements

Fig. 2: Orthomosaic and principal components (PCs).

A True-color orthomosaic of the study area, providing a high-resolution reference. B Close-up view of the CFZ with a dashed line representing the contact between the altered and unaltered surfaces. C PC1 highlights the most variance within the dataset; D PC2 emphasizes the second most variation in the data and highlights color variance, notably at the CFZ; E PC3 contains the least amount of variance in the data and highlights the vegetation and sulfur deposits in dark gray; F composite PCA image enhancing visualization between all principal components, and effectively highlights the CFZ and OFZ and other altered regions in red-to-pink colors.

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