Mercator map projection demonstration device and demonstration method

Abstract

The invention relates to a Mercator map projection demonstration device and a demonstration method. The demonstration device comprises a base, a bulb and a light-transmitting globe main body, wherein the bulb and the light-transmitting globe main body are arranged on the base. The bulb is arranged at the place of a globe center of the globe main body; the outer surface of the globe main body is marked with a deformation verification triangle, longitude and latitude lines and an equator; the globe main body is externally covered by a transparent map paper cover; the transparent map paper cover is cylinder in shape, and the center shaft thereof is overlapped with the earth axis of the globe main body; and the diameter of the transparent map paper cover is equal to the diameter of the equator of the globe main body, and the height of the transparent map paper cover is equal to the earth axis of the globe main body. The Mercator map projection process is demonstrated visually through a simple method, and meanwhile, the deformation verification triangle and a length verification line are utilized to demonstrate the deformation property of Mercator map projection vividly; and the demonstration device is convenient to get materials and easy to produce, can enable the abstract theory teaching to become visual and vivid, and greatly improves teaching effect of cartography.

Description

technical field [0001] The invention belongs to the technical field of teaching demonstration tools for colleges and universities, and in particular relates to a Mercator map projection demonstration device and a demonstration method. technical background [0002] Maps, as a way of human image thinking and the second language of geography, have a long history and are still in the ascendant. Since the earth is an irregular sphere, in order to express the natural and human elements on the surface on a plane, it is necessary to use a map projection. However, there is no perfect map projection until now, because the ellipsoid of the earth is A non-developable surface must have area, length, and angle deformation during the map projection process. In front-line teaching, formula derivation or slide presentation is often used for map projection teaching, but the effect is not very satisfactory, because the theory here is more complicated and the process is more abstract, which is...

AI Technical Summary

Problems solved by technology

[0003] In order to enhance the intuition, vividness and interest of map projection teaching and solve the problem of poor teaching effect, the present invention provides a Mercator map projection demonstration device and method, using the device to demonstrate the entire process of Mercator projection, It enables students to intuitively observe the whole process of the transformation of ground features from spherical to flat, and understand the deformation properties and characteristics of Mercator projection

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