Define a location of a non-point object

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To define the location of a non-point object, such as a segment, multiple coordinates are necessary since a single point cannot adequately represent its extent. At least two points are required to describe a segment, and the choice of coordinates depends on the specific application. For instance, in orbital calculations, the center of gravity is crucial, while in collision avoidance scenarios, the coordinates of the object's extremities are more relevant. The context of the object's movement, like an airplane in the sky versus on the ground, influences how its position is represented. Understanding these distinctions is essential for accurately locating extended objects in space.
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Lets suppose we have a object which its a not a point.Lets call it a segment which is 1 meter.If we want to locate this object in space we need to use coordinates but coordinate is a point.So I think point cannot describe a segment than how I can show it.
Thanks
 
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You need more numbers to describe the position of an extended object. (5, not 3)
 
You need at least 2 points to think of a segment.
 
It depends on your purpose of assigning coordinates.

For some applications, perhaps calculating orbits, the coordinate of the center of gravity is most important. In others applications, such as collision avoidance, the coordinates of extremities is most important.

Think of an airplane flying in the sky versus an airplane navigating on the ground at a crowded airport.
 
ok thanks
 

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