Open ArcScene, load the original DEM data, and color it with layers. Select the DEM layer and open the properties to find the basic height. Search for and click the grid range (3D Analyst) or raster to domain. You can also find it in the toolbox. Stretch the line with background color to the boundary of the map. Just like setting DEM, open the properties of line boundary layer and select Stretch in the properties.
Check the elements in the stretch layer, which is not checked by default. Select the stretching method, and the blue font description under different stretching methods. In this example, what is chosen is to add it to the minimum height of each element. Select the stretching value or expression, and you can click the gadget on the right to enter the formula. In this example, you can directly enter the default value of 0 into 1.
The data used is DEM elevation data. There are many kinds of resolutions on the Internet, so you can choose according to your own needs. Generally speaking, too much data will affect the efficiency of modeling, and large-scale schematic diagrams do not need too high resolution data, or even need to reduce the resolution later.
Schematic diagram
Generally describing or representing the shape, relative size and relationship of objects, describing the general structure and working principle of a certain equipment or machine, and describing a schematic diagram of a certain technological process are all called schematic diagrams.