Maps
The map above provides a good overview of where Portland is in relation to Nashville and Kentucky. This map is from www.mapquest.com.
If you go to mapquest, you can enter any address in Portland (or anywhere in the USA for that matter), and mapquest will draw you a map. If you are entering a Portland address in mapquest, enter the address and then enter zip code 37148.
Sumner County maintains online GIS (Geographic Information System) maps for the entire county. This includes Portland. You may access the maps here:
http://tn.sumner.geopowered.com/
Based on what we have learned about the system, here are a few tips:
1. Don't try accessing the system over dial-up Internet. You need broadband.
2. Use Internet Explorer. It does "unusual" things in other browsers.