Any good map will tell you how to read itself. Take the above legend from a standard USGS quadrant map. From left to right, it gives you information on where and when the map data was compiled, the area’s magnetic declination, the scale (note the contour interval below it), the location of the shown area in relation to the state it’s in (in this case, Texas), and a key to the symbols used to represent roads. Let’s look at what this information represents and how you can use it.
Source: Outside Online: How to Read a Map
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