Quadrangles... Maps. I noticed another thread on maps but it said only top quality very large maps. These are top quality topographic 7.5 minute maps and you can get any quad you want for free all you need is Google Earth and MapFinder, a free app. If you've done any travelling by map and compass, orienteering, then you have probably used a quad because most other maps are not detailed enough for actual travel on the ground. These maps do not show large areas, they show small ones in great detail in order to actually move yourself arcoss the landscape. Thanks to the USGS you can now get all the quads of your area or the area you want to bug-out to.