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GPS Training Answer Keys

Review Questions Answers


1. In general, what does a legend show ?


Legends describe map symbols, such as what color line delineates a road or land ownership boundary, or what figure represents a building, stream, spring, or airport.


2. Referring to a map scale, describe a representative fraction and give an example:


A representative fraction of 1/24,000 (1:24,000) means that one UNIT of measurement (inches, millimeters, feet, etc.) on the map is equal to 24,000 of the SAME UNITS on the ground.


3. What is a graphic scale on a map ? Give an example:


It usually COMPARES map distances to the ground distance in DIFFERENT units of measurements. Usually a graphic scale is a line marked off on a map indicating so many inches or millimeters equal so many feet, kilometers, chains, or miles on the ground. A comparison scale of 1" to 2000 feet means that 1 (one) inch on the map is proportioned to 2000 feet on the ground.


4. What are the five most common colors found on a U.S.G.S topographic map and what features do those colors represent ?


A. BLACK - Most cultural or human-made features, boundaries.

B. BLUE - Water features such as lakes, rivers, or swamps.

C. GREEN - Vegetation such as woods, orchards, or vineyards.

D. BROWN - All relief features, contours, cuts and fills (Topographic maps).

E . RED - Main roads, built-up areas, boundaries, special features.


5. If you had three different types of maps, could you use the same symbol key for all of them ? Why or why not ?


You can use the same symbols from one map to another.


6. What cardinal direction is usually indicated at the top of map?  North

Bottom of a map?  South

Right of map?  East

Left of map?  West


7. List the three categories of maps.


1. Planimetric Maps

2. Topographic Maps

3. Orthophoto Maps


8. List two examples of planimetric maps.


Road atlas and street maps.


9. List the two types of topographic maps.


Contour maps and shaded relief maps.




​Maine Forestry

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