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Continental regions are usually based on broad experiences in human history and attempts to reduce very large areas to more manageable regionalisation for the purpose of study. As such they are conceptual constructs, usually lacking distinct boundaries. Oceanic division into maritime regions are used in conjunction with the relationship to the central area of the continent, using directions of the compass. Some continental regions are defined by the major continental feature of their identity, such as the Amazon basin, or the Sahara, which both occupy a significant percentage of their respective continental land area. To a large extent, major continental regions are mental constructs created by considering an efficient way to define large areas of the continents. For the most part, the images of the World are derived as much from academic study s the media, or from personal experience of global exploration. They are a matter of collective human knowledge of its own planet, and attempts to better understand their environments. |
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