Create and Edit a Mapcheck in Civil 3D
Brian J Hailey, PE now of Applied Software walks through how to create and revise a Mapcheck in Civil 3D.
From the C3D+ YouTube Channel.
and the Applied Software Technology Inc blog.
Mapcheck in one of those useful Civil 3D Object Model tools that is easy to overlook and/or make incorrect assumptions about how a Mapcheck works and what it does.