The map is based on the laws of mathematics, the use of the cartographic language, cartographic generalization, in a certain vector, expressing a variety of things on the Earth (or other celestial bodies) spatial distribution of contact and time in the development and changes in the state of graphics. With the advances in technology, the concept of the map is continuous development and changes in the map as a "reflect the image of the natural and social phenomena, Regal model, map is a carrier of spatial information, spatial information delivery channel and so on. Traditional maps of multi-carrier for the paper, along with the development of technology such as electronic maps. Another song of the same name "map".
Map is in accordance with certain rules, to two-dimensional or multidimensional form and means of graphics or images of certain phenomena of the Earth (or other planets) in the plane or sphere, it has a rigorous mathematical foundation, symbol systems, text annotation and be able to map the broad principles, scientific and reflect the distribution characteristics and the relationship between the natural and socio-economic phenomenon.
The definition of the map at this stage are: the laws of mathematics (ie, modeling), symbols, abstract reflect the objective reality and the image of the symbolic model called graphical mathematical model.