But why they change the name I rather they stay same as Canterlot, ponyville and Baltimore

@Joshua  
White Tail Wood is at about that location roughly, so it makes sense.  
It’s also featured in the Running of The Leaves and I think a few other episodes.
 
EDIT: Although it does not line up with where this map labels it entirely unless that entire section of forest is White Tail Woods, which is possible. Still South of Tall Tail and near the western cost

Actually, based on sources, it’s apparent that Bridlewood was originally White Tail Woods; a location featured in IDW’s Spirit of the Forest comic series.

@Background Pony #F6B4  
A New Generation takes place in Equestria’s future. They take place in the same world.

This doesn’t makes no sense?  
After FiM into ANG?!