History of World Map
World map purpose is to show places on earth as they appear in their true location, in terms of latitude and longitude. Cartographers use a technique of transforming the curved earth onto a flat surface that is called projection. It would have very difficult to project globe into flat map to preserve the accuracy of all aspects. The distortion of one can affect other properties of globe.
Types of map:
Maps are very useful tool for different purpose, people use these world maps for forecasting weather, to plot population, to locate mineral and gold, to know about geology and soil type, agricultural map, climate map, rainfall map to measure rains, air rout map for aeroplanes, world earthquake danger zone map to understand the area under earthquake zone, world forest, wildlife and national paks map, fisheries map, natural resources map to locate the important resources, language map to devide the world through language, litracy map, rivers map, temperature map to understand the climate and some other purpose. The world maps divided into two major categories – general and thematic. The political maps and physical maps come into general and maps with specific theme come into thematic such as climate and bio geographical.
When we need actual area and distance of a map we use scale. Linear scale is popular way to get actual area measurement. The line is marked off in units representing the real distance of the map given in miles and kilometre. The latitude and longitude play the major role for location of an area; these are the horizontal and vertical lines all over the map create geographical coordinates called latitude and longitude which measure area of world or earth sphere in degrees and shows angular distances.
Conventional symbols used on maps to show any map feature, such as green for forest, and animal shapes for particular wildlife areas.
Some of these important world maps are shown here.
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