*4.2. Land-Sea Coral Reefscape Mapping with a Superspectral WorldView-3 Stereo-Imagery*

The greatest novelty of the WorldView-3 resides in the collection of the eight-band MIR spectral bands, doubling the spectral bands of the WorldView-2 and extending the spectrum to 2365 nm [27]. The individual contributions of the eight MIR bands all contributed to the gain in classification accuracy of the land-sea coral reefscape compared to the basic mapping performance, ranging from 9.47% (MIR1) to 9.58% (MIR8), through 9.57% (MIR7). These significant inputs corresponded to a boosting of the optical (VIS+NIR) prediction, ranging from 0.68% to 0.79%.

The topobathymetric DSM reinforced the classification accuracy derived from the WorldView-3 optical datasets provided with the eight MIR bands. The best performances were here ensured by the MIR1 (9.73%), then the MIR8 (9.69%), while the least gain was attributed to the MIR3 (9.42%). Referenced to the optical dataset, the DSM therefore ameliorated the classification of:

