Boundaries between the continents of Earth Boundaries between the continents of Earth The boundaries between the continents of Earth are generally a matter of geographical convention. Several slightly different conventions are in use. The number of continents is most commonly considered seven but may range as low as four when the Americas and Afro-Eurasia are each considered a single continent. According to the definition of a continent in the strict sense, an island cannot be part of any continent, but by convention and in practice most major islands are associated with a continent. There are three overland boundaries subject to definition: While the isthmus between Asia
Earth Platinum of each continent (showing political and physical features), maps of the oceans, (including shipwreck locations) and poles, as well as very detailed regional maps. The book also includes a double-page 6 feet x 9 feet layout of the world's flags. The atlas was printed in Italy and hand-bound in Hong Kong. Among its many spectacular images, "Earth Platinum" contains the world's largest image in a book, a photo of the Shanghai skyline. This image size is 272 gigapixels and made up of more than 12 thousand images tiled together. Published 20 February 2012, "Earth Platinum" follows publication of the "smaller"