Bathymetry of Ischia Island and its offshore (Italy), scale 1:50.000

Figures & data

Figure 1. Location map of the study area.

Table 1. Multibeam equipment used.

MBES Model	Frequency	No of beams	Swath angle	Depth range	Footprint diameter @ 100 m range	Coverage (times water depth Z)
Reson SeaBat © 8101	240 kHz	101	150°	0–500 m	2.6 m	1.8–7.4 Z
Reson SeaBat© 8111	100 kHz	101	150°	50–1000 m	2.6 m	1.8–7.4 Z
Reson SeaBat© 8160	50 KHz	126	150°	3–2750 m	2.1 m	4–7 Z
Simrad EM3000 ©	300 kHz	127	130°	0–120 m	1.7 m	>8 Z
Elac Bottomchart MkII©	50 kHz	126	150°	50–3000 m	2 m	2–8 Z

Figure 2. DTM of Ischia Island. (a) Shaded relief; (b) Aspect map; (c) Slope map.

Figure 3. Diagram showing the main morphological units of the seafloor surrounding Ischia.

Figure 4. DTM of Ischia Island. Colours represent the main morphological units based on slope/depth pairs. See text for further details.