These maps contain both elevation data, by means of countour lines, and location via coordinate systems. It will return a list of features that match the name you entered, along with the lat/long for each one.
Enter your town in the 'Feature Name' box and select the appropriate state before clicking on the 'Send Query' button. *Lookup your Lat/Long online at the US Geological Survey GNIS Web site. There are several common methods for doing so: The first step, then, is finding your latitude and longitude as accurately and precisely as you can. The actual size of a grid square depends on the particular location, as the 1° of longitude represents different distances at different latitudes longitude lines are closer together at the Earth's poles than at the equator. The 4-digit grid squares cover a pretty big area, while the 6-digit grid square is fairly small. Finding a 6-digit grid square requires considerably more precision in latitude and longitude.
How you go about finding your latitude and longitude depends to some extent on whether you want to know your 4-digit grid square or your 6-digit grid square.
