Map is a flat representation of the earth
it is usefull to locate the places and to search the places

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Map is paper on which route , features , roads , tracks are noted 
it is used to know how far the places are
which way to go to meet our destination
how hot or cool the places are
what are the climatic conditions there ect

hence map helps us to know about different places in world

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map is a copy of route on a paper . map is used to find places ,or to show someone any place who is unknown about that area