I'm confused about how to distinguish the two. Prior to making this question. I've read the wikipedia entry on the subject but it mentions that for example a transverse valley makes 90 degrees with that of the main mountain chain.
I'm not savvy with terrain profiles, so this clue about angles makes me confused. So could someone help me with an adequate diagram or picture on how to distinguish it from a longitudinal valley?
The same entry mentions about Val de Travers which it warns that despite of its name is a longitudinal valley. But I don't know why does it make this claim.
Because none of the articles do properly explain this with some sort of picture other than a photo I can't exactly tell at which difference is being talked about. Thus an arrow or some sort of marker or indicator over the photo or a diagram would be of much help for better identification.