1. Correct use of data and reasonable determination of proportion

according to Chongqing Building Model Regional scope and geographical characteristics of the model, reasonably determine Chongqing Building model Horizontal scale and vertical scale of the model; Determine the production plan according to the net area and regional content of the panel. The principle of data utilization is: use new surveying and mapping results, require new content and strong reality, so as to achieve the foresight and long-term use of Chongqing building model. The basic data can use topographic maps of the same scale, and the supplementary data can use map data of different scales, satellite aerial photography, planning and construction drawings, general plans, building plans or elevations, renderings, and field scenery photos.

　 2. Correctly and reasonably handle the relationship between various elements

a. The relationship among mountain, water system and traffic in terrain elements should be compatible and matched, and the performance should be reasonable and natural. The color relationship should be handled in harmony, so as to vividly reflect the natural landscape on the spot.

b. Residential areas are treated as buildings, streets and blocks in proportion, block blocks in proportion, and point residential areas not in scale according to the level and proportion relationship. Different representation methods can be selected according to different scale sizes, residential grade and importance, and the expression methods can be determined according to the purpose and requirements.

c. Use exaggeration to show the green area in the model, and enhance the overall performance effect. At present, urban environmental construction is gradually tending to international standardization, and greening environment has become an important part of urban construction. The green area of parks, both sides of roads, urban open spaces, street trees and other elements should be exaggerated; In the vertical landform, the retaining wall shall be reduced as far as possible, and slope greening shall be used to make up for it, so as to highlight the overall greening effect.

3. Carefully formulate construction plan and reasonably arrange construction steps

a. Preliminary preparations. Including the preparation of materials, tools, data and technicians, as well as the technical processing of data and the production of chassis.

b. Arrange the main work in the construction phase. Including chassis treatment and correction; Establishment of topographic elements; Production of various thematic elements and installation of circuit system; The interior decoration of the panel and the connection of various elements between the block panels; The design and production of the outer package. Reasonably arrange the construction period according to the sequence of processes and the amount of work.