Several ways, but normally areas or poi are set up manually and not in an automated fashion.
Mostly because there is no easy way to pipe that data in.
In your post you tell us that you are trying to add these points.
Your screenshot is of something else with wierd huge circles in the air that has nothing to do with what you are doing and was lifted off the unreal blog page.
Please re-formulate your question properly with actual example shots of your problem for people to help.
As far as adding anything in procedurally, you can bring in a CVS as your data source, and loop through it in level BP on the construct event, moving around pre-placed actors.
you could use a ray cast to detect the level of the ground at that spot, and do the math go move the actor up or down accordingly on the Z.