Why are the colors different in different provinces of China? Is there anything special?

There is nothing particular about it, just for people who use maps to visually distinguish administrative boundaries and distinguish the shape and size of administrative areas.

It is a common practice to mark different administrative regions with different colors when making maps. The purpose of this is to make it convenient for map users to directly distinguish the boundaries of administrative areas and distinguish the shape and size of administrative areas.

This method of distinguishing different administrative regions with different colors on the map is the most commonly used method on the administrative division map. Administrative division maps are usually divided into administrative regions, and the color separation level is determined by the administrative level represented on the map. For example, on the map of China, the boundaries and contour lines of provinces, autonomous regions and municipalities directly under the Central Government are marked with different colors.

On the provincial map, the boundaries and outlines of secondary jurisdictions such as regions, provinces, cities and states are distinguished by different colors. On the city map, use different colors to distinguish the boundaries and outlines of counties, flags and county-level cities. On the map of county-level administrative divisions, four-level towns and five-level towns can also be displayed in different colors. The jurisdiction and center of a village.

The map of China refers to a map showing the territory of People's Republic of China (PRC) (China) and the distribution of various geographical elements within it. According to the general classification method of maps, China maps can be divided into administrative maps, topographic maps, natural geographical maps, human geographical maps and satellite image maps.

The National Bureau of Surveying and Mapping Geographic Information has strict regulations on the map scope, national boundaries and drawing methods of important islands in China. Not only the officially published map works, but also the maps of China produced and disseminated by ordinary netizens should strictly abide by these regulations in order to safeguard the territorial integrity of China.

Extended data:

Map projection of China map is often selected according to different formats and mapping requirements. Generally speaking, the following five forecasting methods will be selected:

1, tangent conic projection with equal positive axis area. This projection is used in common horizontal maps in China. Projection parameters: standard latitude: 25 N, 47 N, central longitude:105 e or110 e Because it is an equal area projection, the area of each area on the map has not changed, but the distance and shape are slightly deformed. Therefore, this projection can intuitively show the contrast between the territory of China and the areas of various provinces and regions.

2. Isoangular oblique azimuth projection. The common vertical maps in China (as shown in the title map) adopt isometric azimuth projection. Azimuth projection is adopted because China has a vast territory and a large span in both directions, which is suitable for deformation control in the whole country.

3. Latitude and longitude projection. That is, cylindrical projections with equidistant positive axes are often used in web electronic maps. Because the Cartesian coordinates of any point in the diagram are directly corresponding to its geographical coordinates, there is no need for intermediate conversion, which is convenient for data processing, so it is often used.

4. Spherical Mercator projection. Electronic maps commonly used in web pages. This is an isometric projection, and its advantage is that the geographical things it expresses are not deformed in shape. However, its shortcomings are also obvious. The higher the projection latitude, the larger the geographical area of the same size will be.

For example, on this projected world map, only Greenland with the size of South America 1/6 should be pulled to the size of South America. Fortunately, most areas in China are in the middle and low latitudes, and the difference between the north and south areas is not so great, so this projection is also one of the commonly used projections.

5. Universal Mercator projection. Belongs to the transverse Mercator projection. Google Maps and Google Earth Prediction. Projection has little deformation in mid-latitude area.

Baidu Encyclopedia-China Map