Land Nav- Map reading Flashcards
What publication covers MAP READING and Land Navigation?
TC 3-25.26
What is the definition of a map?
A map is a graphic representation of a portion of the earth’s surface drawn to scale as seen from above.
What does a map provide?
Information on the existence, the location of, and the distance between ground features such as populated places and routes of travel and communication. It also indicates variations in terrain, heights of natural features and the extent of vegetation cover.
Who is responsible for securing maps for the unit.
The G2/S2 section.
How many different sizes of maps are there?
3
What are the different map sizes?
1) Small; 1:1,000,000
2) Medium; Larger than 1:1,000,000 but smaller than 1:75,000
3) Large; 1:75,000 and Larger
Where would you find useful information that will help you read a map.
In the Marginal Information.
Where will you find information about the symbols found on a map?
In the Marginal Information
What should a soldier do prior to using a particular map?
Read the instructions; orient
Where will you find the sheet number of a map
In bold print in BOTH the upper right and lower left areas of the margin, and in the center box of the adjoining sheets diagram which is found in the lower right margin.
Where will you find the series name of a map?
In the SAME bold print as the sheet number, upper left corner of the margin.
Where will you find the scale of a map, and what does it represent?
In the upper left margin, after series name, and in the center of the lower margin, and it a representative fraction that gives the ratio of a map distance to the corresponding distance on the earths surface.
Where will you find the series number of a map?
In both the upper right margin, and the lower left margin
Where will you find edition number of a map?
In bold print in the upper right area of the top margin and the lower left area of the bottom margin.
Where will you find the index to boundaries of a map, and what does it represent?
The index to boundaries diagram (which is a miniature of the map) appears in the lower or right margin of all sheets, shows the boundaries that occur within the map area such as county lines and state boudaries.
What is the adjoining sheets diagram of a map, and what does it represent?
It consists of as many rectangles representing adjoining sheets as are necessary to surround the rectangle that represents the sheet under consideration.
Where will you find the elevation guide of a map, and what does it represent?
In the lower right margin, and it is a miniature characterization of the terrain shown.
where will you find the declination diagram of a map, and what does it represent?
In the lower margin of large scale maps and indicates the angular relationships of true north, grid north and magnetic north.
Where will you find the bar scales of a map and what does it represent?
In the center of the lower margin, and they are rulers used to convert map distance to ground distance. Maps have three or more bar scales, each in a different unit of measure.
Where will you find the grid reference box of a map, and what does it represent?
Center of the lower margin, contains instructions for composing a grid reference.
Where will you find the unit imprint and symbol of a map, and what does it represent?
Left side lower margin. It identifies the agency that prepared and printed the map with its respective symbol.
Where will you find the legend of a map, and what does it represent?
Lower left margin. It illustrates and identifies the topographic symbols used to depict some of the more prominent features on a map.
What are topographic symbols used to represent?
The natural and man made features of the earth, military personnel requires some method for showing identity, size, location, or movement of soldiers, military activity and installations.
What are the colors of a military map?What does each color represent?
Black-Man made features
Red/Brown- Contour lines (red light readable)
Blue- Water Features
Green- Vegetation
Brown- all relief features, man made (cultivated)
Red- Cultural features, populated areas, main roads, boundaries.
How many colors on a military map?
6