The specific steps of cad cutting topographic map are as follows:

1. First open the topographic map we want to cut, click the "Graphics Tools" panel, and then find the "Graphics Cutting" menu.

2. Click the "Graphic Clipping" menu with the mouse, and then select the clipping mode according to the CAD command prompt: [Outer clipping (W)/ Hollow clipping (K)/ Ring clipping (H)/ Graphic clipping (G)]

3. Find the tool with the command SelEntbyPln in the selection set under the tool directory.

4. You can cut the drawing box by selecting it within the boundary.

5. Then enter the command www in the command box to copy the cut topographic map.