USGS.gov is a good source for topo maps. They also have a dealer loacator that lists outlets where you can go buy them.

Another fan of Mytopo.com here. I have used several of their maps and have been very happy with them. I also use DeLorme Topo. I have some real issues with this software but it seems to be the best product available at this time. I also carry the Delorme state atlas in my truck.
I live along the South Carolina coast I have a bug out kit for the family and another for myself (I have to stay during storms). Included in both kits is a family emergency book that includes maps. Mine has detailed waterproof maps to aid me in getting home after the storm.
I grew up in the Sierra Nevada mountians and learned quickly that you always take a map, compass, GPS and the knowlage to use them when you go into the woods. Take a little common sense with you as well, it just might save your life.

If there is a military base with a runway near you give them a call and see if you can have any visual flight rules (VFR) charts that are going to be thrown away. These charts/maps are unclassified and get tossed in the garbage every time a new version is printed.

The changes would most likely be insignificant to anyone who needs the chart for bugging out purposes. The pilots toss them because often times the change is due to the addition of a new radio tower in the area, change to one of the airways/jetways, etc. These changes do not really impact folks using the charts on the ground.

Local Fixed Based Operators (FBOs), the small local airports that usually support recreational flying and corporate jets, will also give away the old VFR charts if you ask.

Link to viewer:
http://nmviewogc.cr.usgs.gov/viewer.htm

I use this site to plan trips. Topo as well as arial photos. (plus lots more).

My first post…

Hallo everybody!
There are a few more things to do with a topo map then orienteering yourself in the outdoors.
On vacation or in case of an emergency you can:
- Use the map on top of a not so warm sleeping bag as a heat shield / windchill protector.
- Same use if you have only your clothes to sleep in or to cover other less equipped people.
-Use it as a windscreen if you are building a fire in windy conditions or for an alcohol- / gas stove.
-Use it as a splint or part to construct a splint.
- Use it to chase and kill bugs.
- Use it for fanning air in your face or in a fire.
- Use it as wrap / cushion for fragile items you found on your way.
- Use it as warming layer and windchill protector under clothing.

If it has a white backside you can also:
-Reflect light and heat from your campfire into a shelter.
-Reflect light in shady spots while taking photos.
-Use the backside as a high contrast background (good if you have do delicate work in lowlight conditions with older eyes or having lost your seeing aid).
-As white and rectangular stands out in most natural environments, you can use it as a signal and message pad for SAR personal. (Only if it is a map of another place and you don’t need it for other purposes).
-Write your log/journal/last will on the backside.
-Cut off the unimprinted rims and/or parts of the map you do not need in the field for various uses you need paper for.

So we see a map is one of the two most useful paper items one can have while travelling, the other is a Newspaper in my opinion. But that will be another thread...

Does it do the dishes too?
I'm sold.

Careful, topo maps do burn, you know.

Welcome.

And after the newpaper post will come the one on TP, right? It's a pretty useful piece of paper also...