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Map Margin and Symbols!
Map's Margin/Symbols!
The key to learning how to use a Topographical Map is being able to find the information needed in the Map‘s Margin. Once you’ve found, read, and understand it, you need to be able to take that information and apply it using the applicable Land Navigation/Map Reading skills.
However, some of the information you’ll read in the margin is “nice to know” but will have little bearing on your basic navigational abilities. This blog entry will only identify/locate those map margin items felt to be critical for you obtaining a basic map reading/land navigation skill level.
- Scale (bottom center) – describes what one unit of measurement on the map is equivalent to on the ground (same unit of measurement (1:10,000)).
- Elevation Guide (lower right, ( not shown)) – provides rapid recognition of major land forms.
- Declination Diagram (lower right, (partially shown)) – indicates the angular relationship between true north, grid north, and magnetic north.
- Bar Scales (bottom center, (not shown)) – scales used to convert map distance to ground distance.
- Contour Interval (bottom center, (not shown)) – used to determine vertical distance/elevation.
- Legend (lower left, (partially shown)) – illustrates the symbol depiction of prominent map/man made features.
To further increase your Map Reading/Land Navigation knowledge, there are numerous subject books that can be reviewed at the local library or commercially obtained.
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