The information in this article applies to:
In floor plan view, I have created a plot plan using the CAD tools. I would now like to convert this polyline into a terrain perimeter. How do I do this?
Chief Architect allows you to convert 2D CAD drawings into a variety of 3D objects, including a plan's terrain perimeter. This allows you to create a terrain perimeter that both bounds the 3D terrain and defines the property on which the plan will be built.
If Terrain Perimeter cannot be selected in the Convert Polyline dialog, there are two possible reasons.
The first is that a Terrain Perimeter is already present, in which case you can simply delete it and then convert your imported polyline to replace it.
The other possibility is that the imported polyline is not completely closed. You can confirm this on General panel of its Polyline Specification dialog. An open polyline will read 'Not closed' under the Area heading, while a closed polyline will show a value. Only a closed polyline can be converted into a Terrain Perimeter.