The design and production of industrial sand model differs slightly from that of general architectural sand models, and the details are also different. The quality of the industrial sand model will directly affect the user's perception of the entire sand model. Therefore, to produce an industrial model with good display effect, one must first understand the basic steps of industrial sand model design and production. Here is a detailed introduction. 

1. Sand model setup: First, the sand model stand should be set stably. It is best to ensure that the direction of the sand model is consistent with the actual position. Then, in the appropriate humidity environment (3-5 cm thick sandy soil), use templates to flatten and compress it to form the lowest plane of the contour lines. Next, place the corresponding grid to the topographic map around the sand model and mark the numbers around the sand model. 

2. Topographic accumulation: Based on the grid, the lowest contour line selected on the topographic map can control the outline of the basic shape of the terrain, as well as the foot, saddle and tabletop of the mountain peak. The calculated peak, saddle and foot are inserted with distinct points at the bends of the river bend, and other corners are extended into the bamboo pole. The height of the bamboo pole refers to the height of the point on the sand table plus the thickness of the bottom sand. According to the bamboo pole and the contour range within the lowest contour, the rough shapes of the top and saddle are superimposed first, and then other parts are trimmed. 

3. Feature Settings: On the sand model, features such as houses, railways, bridges, trees and independent features are represented using similar models. The different widths of roads and rural roads are indicated by different colors. Blue represents the green environment which is the same as the building model. The size of the ground objects should be suitable for the horizontal scale, and the positional relationship should be clear. 

Broadly speaking, industrial models are made according to the shape and structure of the object at a scale proportional to the actual size, and are mainly used for exhibitions and experiments. From an economic perspective, they are mostly used for construction and development, and there are various models, which can be divided into single models and group models. The 'diorama model' discussed in this article belongs to the group model. The difference is that the diorama model must be based on topographical elements and express its thematic elements according to different purposes.