Continent with other islands in the Pacific into one continent called Oceania. This divides the entire land surface of Earth into continents or quasi-continents. The ideal criterion that each continent is a discrete landmass is commonly relaxed due to historical conventions. Of the seven most globally recognized continents, only Antarctica and Australia are completely separated from other continents by the ocean. Several continents are defined not as absolutely distinct bodies but as ""more or less" discrete masses of land". Asia and Africa are joined by the Isthmus of Suez, and North and South America by the Isthmus of Panama. In both
Middle-earth and despite the additional expense, work and delays involved. The definitive map of Middle-earth was published in "The Lord of the Rings". This iconic map incorporates all the chief locations of the main story, and also includes places from some of the background histories. This map was also published (with various additions and embellishment) as a stand-alone poster: "A Map of Middle-Earth". It is important to note that this map does not cover all of Middle-earth, but only shows the north-west of the continent. This is made more explicit in the revised version published in "Unfinished Tales", which is titled