Cutting in topo plan mean the high ground surface such as hill retaining wall and etc..Geomaticyber wanna post to you the manual how to create cutting in AutoCAD..
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Screen Shoot from Geomaticyber Manual
People can download the manual by following link below:
Note :Cutting in AutoCAD usually present to client the high level ground surface and the orientation of cutting drawing show the direction of high level surface to lower level surface in topo plan..Hope people can get advantage from this manual to complete your topo plan... (^_^)v
Resource & Reference: UiTM Senior Note