Different maps have different representations. Some maps are represented by thick black lines, some by double lines, and then the double lines are filled with black at regular intervals, and others are represented. General maps have legends, which specify the symbols of various elements. 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 a certain law, a map is a graph or image that selectively represents some phenomena of the earth on a plane or a sphere in a two-dimensional or multi-dimensional form and means. It has a strict mathematical foundation, symbol system and text annotation, and can scientifically reflect the distribution characteristics of natural and socio-economic phenomena and their relationships by using the principle of map synthesis.

Extended data:

Map is a symbolic model of spatial information, and symbols have the function of map language, which is manifested in the following four aspects:

1. Map symbol is a means of spatial information transmission.

2. The symbol model composed of map symbols can still reflect the basic characteristics of this area without the limitation of scale reduction.

3. Map symbols provide powerful expressive force for maps.

4. Map symbols can reproduce the spatial model of objects or build conceptual models for difficult-to-express phenomena.

function

1, map symbol is a means of spatial information transmission;

2. The symbol model composed of map symbols can still reflect the basic characteristics of the area without the limitation of scale reduction;

3. Map symbols provide great expressive force of maps;

4. Map symbols can reproduce the spatial model of objects or build conceptual models for difficult-to-express phenomena.

References:

Baidu encyclopedia-map symbols

References:

Baidu encyclopedia-map