It exclude Map URL, which should be the obvious choice if you add a location from
Maps app?
By the way, I found a way to add a location (Map URL) to an existing contact.
1. Find the location you want.
2. Click the red pin.
3. Click the "i" icon
4. Click the Share Button on the upper right (the one that has arrow)
5. Send email.
6. In the draft email window, right-click the card icon.
7. Selects Open With.. then Contacts.
8. The Contact app will appear. It will ask you to import 1 card. Click Import.
9. You got a new contact, now with Map URL.
10. Select that URL, hit cmd+C to copy.
11. Go to your desired contact, Click the URL header.
12. Select "Custom"
13. Type "Map URL"
14. Click the URL field, then paste.
15. Now you add a location to an existing contact.
Easy!
Thank you

. You're really Think Different.
(PS: Don't forget to delete a contact you just imported. Phewww!!!)