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Device and method for Gauss-Kruger map projection demonstration

A map projection and demonstration device technology, which is applied to maps/plans/charts, planetariums/globes, instruments, etc., can solve problems such as poor teaching effects, achieve the effects of improving teaching effects, easy design and production, and convenient materials

Inactive Publication Date: 2016-05-25
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to reform the existing teaching methods, improve the teaching level, enhance the intuition, vividness and interest of map projection teaching, and solve the problem of poor teaching effect, the present invention provides a map projection demonstration device and method. The whole process of Skruger projection enables students to intuitively observe the whole process of the transformation of ground features from spherical to plane, and understand the deformation properties and characteristics of Gauss Kruger projection

Method used

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  • Device and method for Gauss-Kruger map projection demonstration
  • Device and method for Gauss-Kruger map projection demonstration

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Embodiment 1

[0021] see figure 1 and 2 , the Gauss Kruger map projection demonstration device of the present embodiment is made up of base 1, light bulb 3, globe main body 4 and transparent paper cover 2.

[0022] Wherein, base 1 is common desk lamp base 1, and bulb 3 is installed on base 1, and globe main body 4 is also installed outside bulb 3, and bulb 3 is positioned at the spherical center position of globe main body 4, and globe main body 4 of the present embodiment is made of Thin iron wires are lapped according to latitude and longitude lines to form a simple globe frame with a spherical network structure and a polyester film with good light transmission covering the globe frame. The bottom of the globe frame is fixed on the base 1, and the top is fastened with pins. Its specification is the same as that of an ordinary globe, and a right-angled deformation verification triangle 5 is pasted on the outer surface of the polyester film, and the longitude, latitude, central meridian, e...

Embodiment 2

[0031]In this embodiment, the first length verification line a, the second length verification line b, and the third length verification line c are along the warp direction, and the second length verification line b is marked on the central meridian, and the first length verification line a is marked Below the second length verification line b and distributed on the left side of the central meridian, and the longitude difference formed between the second length verification line b is 1.5°, the third length verification line c is marked on the second length verification line b and distributed on the right side of the central meridian, and the longitude difference formed between the second length verification line b is 1.5°, that is, the first length verification line a, the second length verification line b, and the third length verification line are guaranteed c along the meridian direction and distributed at different latitudes, the latitude difference between the first length...

Embodiment 3

[0035] In this embodiment, the first length verification line a, the second length verification line b, and the third length verification line c are along the warp direction, and the second length verification line b is marked on the central meridian, and the first length verification line a is marked Below the second length verification line b and distributed on the left side of the central meridian, and the longitude difference formed between the second length verification line b is 2°, the third length verification line c is marked on the second length verification line b and distributed on the right side of the central meridian, and the longitude difference formed between the second length verification line b is 2°, that is, the first length verification line a, the second length verification line b, and the third length verification line are guaranteed c is along the meridian direction and distributed at different latitudes, the latitude difference between the first length...

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Abstract

The invention relates to a device and a method for Gauss-Kruger map projection demonstration. The device comprises a foundation, a bulb and a tellurion body, wherein the bulb is arranged at the center of the tellurion body, the outer surface of the tellurion body has a deformation verification triangle, longitude lines, latitude lines, central longitude lines, an equator, a first length verification line, a second length verification line and a third length verification line, the external portion of the tellurion body is sleeved in a transparent drawing cover in the elliptical column shape, the center axis is perpendicular to an earth axis of the tellurion body, and the inner surface of the transparent drawing cover and two poles of the tellurion body are in a tangent mode. Through the device and the method, the Gauss-Kruger projection process can be represented simply and conveniently, Gauss-Kruger projection deformation properties are represented by utilizing the deformation verification triangle and the length verification lines, materials are easily obtained, design and the manufacturing technology are simple and convenient, abstract teaching is made to be vivid and visual, and the cartology teaching effect is greatly improved.

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 Gauss Krüger map projection demonstration device and method. technical background [0002] The Gauss-Krüger projection was formulated by the German mathematician, physicist, and astronomer Gauss, and the projection formula was supplemented by the German geodesist Krüger, so it is called the Gauss-Krüger projection. 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 has area, length, and angle deformation during the map projection process, and in order to keep one property unchanged, the other two properties have to be sacrificed. In front-line teaching, formula derivation or slideshows are of...

Claims

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Application Information

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IPC IPC(8): G09B27/08G09B29/00
CPCG09B27/08G09B29/005
Inventor 郭斌
Owner XIAN UNIV OF SCI & TECH
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