I am trying to add labels to my linear feature class. Some of my lines are vertical (i.e. I only see a point representing the start or end node of the line, because they have the same XY coordinates but different Z coordinates).
Unfortunately, it seems ArcMap cannot understand where to place the label (e.g. along the line, before the start, etc.) because the line itself is null (i.e. has 0 (zero) shape length).
The same seems to happen in ArcGIS Pro as well (although in the 3D viewer this problem does not occur, see the image below).
Is there a way to solve this?