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.
![best practice closed geometry openroads site modeling](https://envisioncad.com/wp-content/uploads/2017/09/ch02-05.png)
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.
![best practice manipulators closed geometry openroads site modeling](https://envisioncad.com/wp-content/uploads/2017/09/ch02-06.png)
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.
![best practice element information closed geometry openroads site modeling](https://envisioncad.com/wp-content/uploads/2017/09/ch02-07.png)
Contact us today about our OpenRoads Site Modeling class!