What is a globe? What is the function of a globe?

Globe is to facilitate people to understand the earth, people imitate the shape of the earth, according to a certain proportion, made the model of the earth-globe. There are deformations in length, area, direction and shape on the globe, so it is almost correct to observe the relationship between various scenes from the globe.

Function: explain the reasons for the formation of the international international date line when calculating local time and standards at various longitudes; Determine the approximate value of solar declination on any day of the year; Do other demonstrations in geography teaching.

There are several types of globes according to their uses:

(1) latitude and longitude grid globe, its spherical surface only has latitude and longitude grid and degree annotation, also called theodolite;

(2) administrative globe, a globe with smooth spherical surface, representing administrative divisions;

(3) Terrain globe, a model of terrain, is divided into plane uplift and three-dimensional uplift;

(4) A schematic globe showing only the distribution of continental plates and oceans, which is often used for decorative items;

(5) Teaching globe, which is used for school and family geography teaching;

(6) Craft gift globe, which is often used for decoration of pendants in homes and offices;

(7) Large-scale display globes are often used for large-scale exhibitions, teaching observation demonstrations, etc.

Classification by product materials and functions:

According to the product materials and functions, there are paper globes, plastic globes, resin globes, stone globes, metal globes, solid wood globes, magnetic levitation globes, classical craft globes, electronic point reading voice globes, voice globes, video globes and so on.

China implements administrative licensing management for the publication and distribution of globes. The national surveying and mapping department is responsible for reviewing the map contents of the globe, passing the examination and issuing the map approval number; The State Press and Publication Administration is responsible for managing the international standard book number required for the publication and distribution of globes. Globes published in China have 1600 styles and specifications.

Extended data:

Trapezoidal method is used to measure area. Firstly, the trapezoidal number of the measured area of each latitude zone on the earth is estimated, then multiplied by the trapezoidal area of that latitude zone, and then added one by one to get the total area.

There are about 13 trapezoids between latitude 0- 10, with an area of 7962500km^2；; .

There are about 7 trapezoids between latitude 10-20, with an area of 4161500km2.

There are about 5.5 trapezoids between 20 and 30 latitudes, with an area of 3071750 km 2; 2;

There are about three trapezoids between latitude 30 and 40, with an area of1518000km2;

There are about two trapezoids between 40 and 50 latitudes, with an area of 876000km^2；; .

There are about 1.5 trapezoids between 50 and 60 latitudes, with an area of 534000km^2；; .

Adding up the above trapezoidal areas, the area of South America is about 18 123750 km 2.

Globe is a common tool for geography researchers, a common teaching aid for geography teachers and a tool for the general public to solve some geography-related problems. It has the following functions:

(1) Correctly representing the positions, directions and areas of continents, oceans, islands and countries on the earth;

(2) Define the shape of the earth and the concepts of its axis, pole, polar circle, tropic of cancer, equator, longitude and latitude;

(3) explain the reasons for the earth's revolution and rotation, day and night, four seasons, local time and standard time;

(4) Calculate the geographical coordinates of any place, the area of a certain area, or the distance between any two places marked on the globe;

(5) Measuring the hours of day and night and the time of sunrise and sunset anywhere at a certain latitude;

(6) Calculate the number of days at any latitude in the polar circle and the start and end dates of polar painting and polar night;

(7) Calculate the number of days and start and end dates of white nights anywhere in temperate high latitudes;

(eight) the date of determination of the twenty-four solar terms;

(nine) when calculating the local time and standard at each longitude, explain the reasons for the formation of the international international date line;

(10) Determine the approximate number of solar declination on any day of the year;

(eleven) other demonstrations in geography teaching.

References:

Baidu Encyclopedia-Global