What is the concept of land?

A map is a chart that uses lines, symbols, colors, text notes, etc. Describe and show the physical geography, administrative areas and social conditions of the earth's surface in a certain proportion.

With the progress of science and technology, the concept of map is constantly changing. For example, maps are regarded as "images and symbol models reflecting natural and social phenomena", "carriers of spatial information" and "transmission channels of spatial information".

Ancient maps were generally painted on parchment or slate, and the carrier of traditional maps was mostly paper. With the development of science and technology, electronic maps and other carriers have appeared.

According to certain drawing rules, a map expresses the spatial distribution, relationship and development of various things on the earth (or other celestial bodies) in time by drawing synthetic graphics on a certain carrier.

A map is a chart or an image. According to certain laws, it selectively represents some phenomena of the earth (or other planets) on a plane or sphere in two-dimensional (2D) or multi-dimensional (3D) forms and means. It has strict mathematical foundation, symbol system, text annotation and the ability to summarize principles with maps, and scientifically reflects the distribution characteristics and their relationships of natural and socio-economic phenomena.

At this stage, the definition of a map is that it reflects the objective reality of the symbolic model of an image or the mathematical model of a graph with certain mathematical (mathematical) laws (that is, stylization), symbolization and abstraction.

Maps are based on certain mathematical laws. The earth (or other stars) uses map language to reduce the reflection of natural and human phenomena on the plane, and reflect the spatial distribution, combination, connection, quantity and quality characteristics of various phenomena and their timely development.

Extended data:

Map function:

1. Testability generated by special mathematical rules. Special mathematical rules include map projection, map scale and map direction.

2. Use map language to express the intuition generated by things. All kinds of complex natural and human things represented on the map are realized by map language. Map language includes map symbols and map annotations.

3. Overview generated after implementation of cartographic generalization.

4. Maps must follow certain mathematical laws.

The map is drawn on a plane, and it must accurately reflect its relationship with objective entities in terms of location, attributes and other elements.

5. Maps must be scientifically summarized.

The reduced map cannot accommodate all the phenomena on the ground.

6. This map has a complete symbol system.

The object of the map is mainly the earth. There is a great deal of geographic information on the earth, including natural and socio-economic phenomena. Only through a complete symbol system can this phenomenon be accurately expressed.

7. Maps are carriers of geographic information.

Maps contain and store a huge amount of information. As the carrier of information, they can be traditional paper maps, physical models, various visual screen images, audio-visual maps, tactile maps and so on. Decorate and annotate floor plans.

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