contour line

Exhibition Description

Exhibitions are located in the Children's Happy City exhibition area. As shown in the above figure, exhibitions consist of a sand table system and a projection device. When the shape of the sand is changed, different landforms are projected, displaying mountains, rivers, and hydrology. Children are playing games on the console. When you build a small hill on the terrain, the red color represents the high terrain. When you dig a shallow pit, the green color represents the low terrain. If you continue to dig, it will turn blue, indicating that it is an ocean or river.

Presentation format and purpose

Exhibition items utilize multimedia display format to showcase contour knowledge of altitude, understand closed curves, understand how numerical values are transformed into shapes, and reflect terrain.

Exhibition Content

Contour lines refer to the closed curves formed by adjacent points of equal elevation on a topographic map. A closed curve is formed by connecting points with the same elevation on the ground, projecting them vertically onto a horizontal plane, and proportionally scaling them on a drawing to obtain contour lines. Contour lines can also be seen as the intersection of horizontal planes at different altitudes with the actual ground, so contour lines are closed curves. The number marked on the contour line is the altitude of the contour line. Contour features:

1. Ground points located on the same contour line with the same elevation. But points with the same altitude may not necessarily be located on the same contour line.

2. Except for cliffs, contour lines of different elevations cannot intersect.

3. The height difference between adjacent contour lines within the contour is generally the same, so the ground slope is inversely proportional to the contour line spacing between contour lines. The smaller the contour line spacing, the denser the contour line arrangement, indicating a larger ground slope; The larger the contour line spacing and the sparser the contour line arrangement, the smaller the ground slope.

4. A contour line is a closed curve, and if it cannot be closed within the same frame, it must be closed within adjacent or other frames.

5. When contour lines pass through ridges or valleys, they change direction. Therefore, the ridge or valley line is perpendicular to the tangent line at the turning point of the contour line, that is, the contour line is orthogonal to the ridge or valley line.

Multimedia Script Outline

Camera frame, theme, video frame, content overview, duration/second

1. Start the program on standby, the camera recognizes the uneven terrain, connects the points with the same elevation on the ground into a closed curve, and projects it vertically onto a horizontal plane to achieve contour effect/

Contour lines appear around the interactive highland, projecting the color of the mountain on the sandy slope/

Exhibition operation process

Exhibition dimensions

length width height

Overall size 1.4 1.4 2.2

exhibits composition

1. Main Material List:

Main component names, main materials, processing techniques

Platform components: artificial stone+flame-retardant wood board+Q235A board+Q235A square tube carving machine cutting, artificial stone hot bending; Laser cutting, sheet metal bending, rust prevention, paint baking

Hanging component Q235A board+Q235A square tube laser cutting, sheet metal bending, rust prevention, paint baking

Clear acrylic engraving machine for instruction board cutting, UV printing

2. Main equipment list:

Name, Specification, Unit, Quantity

Computer i3-8G-1T-2G discrete display 1

Projector 4000 lumens, standard definition component 1

Leakage protection 1P+N, 6A pieces 1

Camera motion sensing, 1080P piece 1

Environmental Requirements

Category requirements

Ground bearing capacity of 400Kg/m2

Electric power consumption AC220V/1.0kW

Do you need water supply and drainage □ Water supply □ Drainage □ Water supply and drainage

Do you need to connect to the network? Yes □ No

Ordinary lighting is required for ambient light

Daily Management

1. Open all day, no need for dedicated personnel to guard, but requires supervision;

2. Automatically turn on when powered on, automatically turn off when powered off.

repair and maintenance

Regular maintenance.