In Civil 3D, creating surface boundaries is essential for controlling the extent of your surface and removing unwanted areas.<br />🎯 Steps to Create Surface Boundaries in Civil 3D:<br />Step 1: Open Surface Properties<br />Go to the Toolspace panel.<br />Under the Prospector Tab, expand Surfaces.<br />Select the surface you want to edit (e.g., Existing Ground).<br />Step 2: Access Surface Definition<br />Right-click on the surface and select "Edit Surface Style".<br />In the Definition tab, find the Boundaries option.<br />Step 3: Add a New Boundary<br />Right-click on Boundaries and select Add....<br />In the Add Boundaries Dialog Box:<br />Name the boundary (e.g., Outer Boundary).<br />Set Type to Outer, Show or Hide.<br />For cutting inside areas, use the Hide boundary option.<br />Click OK.<br />Step 4: Select the Boundary<br />Select the Polyline or feature line that defines your boundary.<br />Press Enter.<br />✅ Surface Updates Automatically<br />Your surface will update, trimming areas outside the boundary.<br />🌟 Pro Tips:<br />For multiple boundaries, add Inner Boundaries or Data Clip Boundaries.<br />Use Hide Boundaries to exclude unwanted areas like ponds or buildings.
