地图投影的判别和选择投影方式的依据（The criterion of projection projection and the basis of choosing projection method）.docVIP

地图投影的判别和选择投影方式的依据（The criterion of projection projection and the basis of choosing projection method） The criterion of projection projection and the basis of choosing projection method As we all know, there are many types of map projection. They are used in different situations. What is the basis for choosing map projection in production? How should I determine the projection type? What are the characteristics and deformation characteristics of different projection types? With these questions, please see this article Different types of projection usually have different features of latitude and longitude, so the projection type can be determined by the shape of the warp and weft network. In determining the type of projection, it is very important to accurately distinguish the longitude and latitude lines from straight lines to curves, concentric arcs and coaxial arcs. First, the projection of the projection of different projections, with different deformation characteristics. Identifying the type and deformation properties of projections is the basis for correct use of maps. Since large scale maps usually belong to the national basic scale topographic map, the projection is simple, easy to understand, and the mapping area is small, no matter what projection is used, the deformation is very small. Therefore, the projection projection is mainly based on small scale map. Discriminant map projection, usually the first is to determine the projection type according to the graticule shape, such as azimuth projection, cylindrical projection, conic projection; then the deformation to determine the nature of the projection, such as isometric integrable or arbitrary projection. 1, determine the projection type, different types of projection usually have different characteristics of latitude and longitude, so the projection type can be determined by the shape of the longitude and latitude network. In determining the type of projection, it is very important to accurately distingu