The DrawBlip() method takes the input parameters of the position of the blip (as a Vector2 X, Y pair) and the reference to the RawImage prefab to be created at that location on the radar.
A new GameObject is created (instantiated) from the prefab and is parented to the radar GameObject (of which the scripted object is also a component). A reference is retrieved from the Rect Transform component of the new RawImage GameObject that has been created for the blip. Calls to the Unity RectTransform method,
SetInsetAndSizeFromParentEdge(...), result in the blip GameObject being positioned at the provided horizontal and vertical locations over the radar image, regardless of where in the Game window the background radar image has been located.