Geology /Army Board - Land Nav FM 3-25.26 Part 3
Where will you find the horizontal datum note of a map, and what does it represent?
Center of the lower margin, and it is defined as a geo-detic reference point.
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Key Terms
Term
Definition
Where will you find the horizontal datum note of a map, and what does it represent?
Center of the lower margin, and it is defined as a geo-detic reference point.
Where will you find the control note of a map and what does it represent?
Center of the lower margin. Indicates special agencies involved in the control of the technical aspects of all of the information which is disseminate...
Where will you find the preparation note of a map, and what does it represnt?
Center of the lower margin, indicates the agency responsible for map repairs.
Where will you find the printing note of a map? what does it represent?
Center lower margin, indicates agency responsible for printing the map, and the date on which the map was printed.
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.
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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.
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| Term | Definition |
|---|---|
Where will you find the horizontal datum note of a map, and what does it represent? | Center of the lower margin, and it is defined as a geo-detic reference point. |
Where will you find the control note of a map and what does it represent? | Center of the lower margin. Indicates special agencies involved in the control of the technical aspects of all of the information which is disseminated on a map. |
Where will you find the preparation note of a map, and what does it represnt? | Center of the lower margin, indicates the agency responsible for map repairs. |
Where will you find the printing note of a map? what does it represent? | Center lower margin, indicates agency responsible for printing the map, and the date on which the map was printed. |
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 |
What direction do lines of latitude run? | East to West |
What are the rings around the earth parallel to the equator called? | Latitude Lines |
How do you read a map with a protractor to determine a gird? | Right and Up. |
What is the universal transverse mercator grid? (UTM) | Designed to cover the part of the world between latitude 84 N and latitude 80 S, and as it's name implies, is imposed on the transverse mercator projection. |
What does UTM stand for? | Universal Transverse Mercator grid |
How are distances always measured? | Right and up |
How many grid zones is the world divided into? | 60 grid zones. |
How close will a six digit grid be to a location? | within 100 meters. |
How close will an 8 digit grid be within a location | within 10 meters |
How close will a four digit grid be to a location? | Within 1,000 meters |
What does the graphic bar scale do? | A ruler printed on a map, used to convert distances on the map to actual ground distances. |
How many units of measure are used for direction? | 3 |
What are the 3 units of measurement used for direction? | 1) degree ( most common) 2) mil ( used mainly in artillery, tank, and mortar gunnery) 3) grad ( metric unit of measure, found on some foreign maps.) |
How many baselines are on a military map? | 3. |
What are the 3 baselines (Versions of North) on a military map? | 1) True north 2) Magnetic North 3) Grid North |