Photogrammetric modeling of artificial and natural habitats


As part of her doctoral thesis, Elisabeth Riera (Co-directors : Patrice Francour, ECOSYS UMR, UCA & Cédric Hubas UMR BOREA, MNHN) is working on the optimization of a new generation of artificial reef designed by 3D printing (BOSKALIS & D-Shape), immersed in the Larvotto reserve under the management of the Monegasque Association for the Protection of Nature (AMPN). In order to evaluate these new structures and to compare them with natural habitats and classical artificial reefs, indicators of habitat complexity have been developed.

For this purpose, the CREOCEAN and GEOLAB's expertise and methodology in underwater photogrammetry were put forward to model artificial reefs and natural rocky habitats in the Roquebrune Cap Martin reserve and in the Larvotto reserve with the support of the AMPN.

In addition, a comparison of in situ measurements with numerical models measurements (3D photogrammetry plans and models) will make possible the determination of the variability of the indicators and their relevance.

The illustrations depict divers taking underwater shots, that are required for photogrammetric models.

In the long run, it will be possible to apply this technique to other research areas.

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