When creating features which are closed, it is important to consider how the geometry will eventually be used in the 3D model. In general, it is not a good practice to start the geometry on a corner. The reason for this is that if the start point (and thus also the endpoint) are on a corner, it can sometimes complicate our ability to define side slopes.

For example, the building pad for our site is created by a complex horizontal alignment which produces a closed shape. However, the beginning of the shape is not on a corner.

You will notice several offset rules and multiple lines between points. However, sorting the various rules when the entire complex is selected can be difficult.

In the top tree view of Element Information, expand the complex and highlight the first line in the list of elements.

Now we can see that the first element is a line between points and also notice that it begins on an edge, not on a corner.

Contact us today about our OpenRoads Site Modeling class!