Second Node Location Map

I would like to have a second node location map with the same nodes as the first, but I also want to add another type of node in this map. I do not want this type of node on the first node map. I hope this makes sense.
I apologize if this is in another topic, but it is hard to word this specific thing on the search and come up with relevant results.
Thank you in advance. Any help would be greatly appreciated.