Analysis of making sand table model


How to make a brief sand table model, let me briefly explain the steps of making a sand table model.

The sand table model determines the sand table scale and calculates the size of the sand table. When making the sand table, first mark the area on the topographic map and then determine the sand table scale. The sand table scale is divided into horizontal and vertical scales. The horizontal scale is the level between two points of the sand table model. The ratio of the distance to the corresponding horizontal distance on the ground. The size of the horizontal scale depends on the purpose and conditions of use. For example, when studying the tactical actions of the team, the scale is usually greater than 1: 1 000. The ups and downs of the landform, making the sand table in the mountain, the vertical scale can be the same as the horizontal scale or doubled, and making the sand table in the hills or plains, the vertical scale is usually 2-5 times the horizontal scale. Calculation method: vertical scale denominator=horizontal Scale denominator / (magnification) multiple.

Divide the grid within the area of ​​the topographic map (such as the coordinate network on the topographic map can be used, or no grid), and the number, the size of the grid, according to the required accuracy and magnification. The minimum contour is determined on the starting surface of the sand table height, as well as the contours that can control the basic shape of the landform and the main points such as the top of the mountain, the saddle, the foot of the mountain, and the tilt transformation point. The height on the sand table. For example: the horizontal scale is 1 / 2000, and the vertical scale is four times larger than the horizontal scale, then the vertical scale denominator=2000 / 4={{ 4}} After the vertical scale of the sand table model is determined, the height of the main terrain points (mountain top, saddle, mountain foot, etc.) on the sand table is calculated.

The materials used to make the sand table model are generally: sand table frame, pedestal, fine sand, soil, ground model, representing roads, various colored paper (cloth) strips of rivers, sawdust rendering landform tones, paint, soldiers representing combat operations Team logo and team number, cards used to describe the names of residential areas, highlands and rivers, as well as tools such as bamboo sticks (wooden sticks), string, pushpins, rice rulers, writing brushes, and spades.