Maps are a visual representation of an area. Maps can be static-two dimensional, dynamic or interactive, even three-dimensional. Maps depict geography. Maps may also represent any space, real or imagined, without regard to context or scale or DNA mapping and extraterrestrial mapping. Maps are used by hikers especially where there are no roads with signs. Maps are an essential tool of geography, used in schools and colleges to record definite facts of positions, relief, climate, vegetation, materials and their distribution broadly over the earth, in continents, countries, states. Maps illustrate physical features, rainfall, seasonal temperatures, mineral products, vegetation, important towns, harbors, population areas, railway lines, air-routes etc.