Metropolitan topobathymetric cartography

Metropolitan topobathymetric cartography is a representation of the surface of the coastal strip, both the surface (dry beach) and the submerged part, to an approximate depth of between 15 and 20 meters. The depth is represented in the surface part with contour lines and in the submerged part with isobaths, both with an equidistance of 0.5 meters. No planimetric element is represented, only the relief of the seabed.