*2.3. Spaceborne Dataset*

Launched on 13 August 2014, the commercial WorldView-3 spearheads the choice of sub-metre civilian satellite, given its hyperspatial and superspectral capabilities, namely one panchromatic band at 0.3 m, five VIS + three NIR bands at 1.2 m, and eight MIR bands at 3.7 m. The pansharpening technique can successfully produce 16 spectral bands at 0.3 m spatial resolution ([27], Figure 2).

**Figure 2.** Lineplot of the superspectral (16 bands) WorldView-3 sensor's sensitivity as a function of their wavelengths.

Provided with a daily revisit, this sensor leverages a swath width of 13.1 km and length of 112 km. The WorldView-3 dataset used here is a stereo-imagery acquired on 18 July 2018 at 20:35:38 UTC (Figure 3a, Table 2) and 20:36:39 UTC, respectively (Figure 3b, Table 2).

**Figure 3.** Natural-coloured WorldView-3 imageries of the study area, taken on 18 July 2018, over the north shore of Moorea Island (French Polynesia). (**a**) Imagery #1 taken with 26.4◦ off-nadir viewing angle; (**b**) Imagery #2 taken with 16.5◦ off-nadir viewing angle.


**Table 2.** WorldView-3 specifications related to the stereo-imagery acquisition over the study site.
