Relief shown pictorially. North oriented toward bottom left of sheet. Latitudinal and longitudinal lines along margins. Index in bottom right. Decorative cartouches, compass roses, rhumb lines. Shows topography, waterways, shoals, soundings, routes. Pictorial vignettes of settlements. Appears in Blaeu's Seespiegel : Insondende Eenkorte Anderwysinghe in de Konst der Zeevaert ..., Amsterdam, 1631.