What is a spatial object?
A spatial object is something that has some sort of geometric meaning, rather than being purely mathematical. Spatial objects can be visualized in some way, such that you could draw them on a piece of paper or render them using 3-D graphics. They occupy some portion of an n-dimensional space, typically 2-D or 3-D. Spatial objects are typically used for generating boundaries or performing collision detection. They can be extremely useful in graphical applications. We can perform special operations on spatial objects, such as testing whether certain objects intersect with each other or whether one volumetric object (such as a sphere) contains another spatial object.
