Difference between うら and 後ろ


What is the difference between these two words? My teacher has listed a few
examples of each:

紙の裏{うら} • ビルの裏 • 裏ゲート

後ろの席 • Aさんの後ろ

My hypothesis is that 裏 refers to a surface (such as paper, building) while 後ろ
refers to the three-dimensional space behind an object (such as seats in a
theatre, space behind a person) **Is this accurate?**

After trying to read an answer on a Japanese forum, I found myself more
confused; 車の裏 can mean the bottom of the car, and ビルの裏 refers to the side
opposite the entrance whereas ビルの後ろ refers to the side opposite the place
where the speaker stands / is talking about. **Are there any general rules to
explain when 裏 means bottom, or when 裏 and 後ろ change depending on point of
view?**

Link to forum: <http://sp.okwave.jp/qa/q7795599.html>




裏 means the opposite side of surface or ~~the field that belongs to that
aspect~~ extensionally a zone that lies in front of that aspect while 後ろ means
backward of something when objects or spaces are put in a row in order.

In other words, when the target object doesn't have linguistically
recognizable surface, 裏 doesn't make sense, and when the surface runs
vertically (and when you take the nearer object in your perspective as 前), 裏
overlaps 後ろ. When the surface runs horizontally, 裏 overlaps 上 or 下 like the
example of a car, in which 後ろ usually doesn't coincide with 裏.

In addition, 裏 usually implies the side invisible from your perspective.




裏 means the opposite side of surface or ~~the field that belongs to that
aspect~~ extensionally a zone that lies in front of that aspect while 後ろ means
backward of something when objects or spaces are put in a row in order.

In other words, when the target object doesn't have linguistically
recognizable surface, 裏 doesn't make sense, and when the surface runs
vertically (and when you take the nearer object in your perspective as 前), 裏
overlaps 後ろ. When the surface runs horizontally, 裏 overlaps 上 or 下 like the
example of a car, in which 後ろ usually doesn't coincide with 裏.

In addition, 裏 usually implies the side invisible from your perspective.

