有没有区别 --> 那里， 那儿， 那边

那儿、那里 are the same , but 那儿 is used more often. 

I looked up the dictionary, there are two meanings:

1. Used with 这儿、这里 (here), mean the place far from the person:

Example: 那儿／那里／那边没有人。There is no one there. 

                 他这儿瞧瞧， 那儿望望。He looks at everywhere. (Literally: He looks at here and there.)

2. mean the indicated places ( Sometimes with the gesture ): 

Example: 警察局在那儿/那里／那边吗？Is the Police Station over there?

那边 literally means the other side; over there; there ( the person／object is not here): 

Example: 山的那边是海。On the other side of the mountain is sea. ！！！In this case you cannot exchange the 那边 for the other 2 words, it means the other side. 

Also, people from the south of China don't like 这儿 , because the 儿 is hard to pronounce for most of them. They often say 那里，那边, but you can say them all to express "there". 

有没有区别 --> 那里， 那儿， 那边

客观上讲，这三个词没有任何区别，你怎样翻译都可以，但是从说话人的主观态度上讲，这三个词略有区别：对同一个地方，说话人说“那里”表明他感觉那个地方有一定的面积，“那儿”表明他不关心那个地方的面积，“那边”表明说话人感觉那个地方与这个地方之间有一段间隔。

在那里 over there / where there be / there

1.请问警察局在哪里？ can you tell me where is the police station?

就在那里/那边/那儿。it's right over there. 

2.从前有一座森林，在那里，居住着一位法力高强的女巫。 Once upon a time there is a forest, where there lives a powerful witch.

3. 你确定你要去那里？ are you sure that u want to go there? 

在那边 over there

在那儿 over there ( oral speaking  , specially Beijing tone)