Return the current Map View Titles Perspective Value:
This value is a way to identify when the map view perspective has changed in a way
floating titles might collide with each other (e.g. zoom, rotation, tilt, etc.)
This allows the floating titles controller to know when to ignore existing titles collisions,
to avoid making titles blink when they are too close together with coordinates calculations
rounding makes them look like they are colliding/not colliding every other frame.
