Map Reading and Land Navigation, TC 3-25.26 & FM 3-25.26 Flashcards
What Publication Covers Map Reading and Land Navigation?
TC 3-25.26
15 Nov 2013
What does TC 3-25.26 Cover?
Map Reading Land Navigation
Para 2-0
What is the definition of Cartography?
the art and science of expressing the known physical features of the earth graphically by maps and charts
Para 2-1
What is the definition of a map?
a graphic representation of a portion of the earth’s surface drawn to scale, as seen from above
Para 2-2
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
Para 2-3
Who is responsible for securing maps for the unit?
The G2/S2 section
Para 2-4
What should you do with a map that is in danger of being captured?
Destroy it
Para 2-4
Why should you destroy a map that is in danger of being captured?
Because it could contain troop movements or positions of friendly soldiers
Para 2-6
How many different sizes of maps are there?
three
Para 2-6
What are the different map sizes?
- Small; Those maps with scales of 1:1,000,000
- Medium; Those maps with scales larger than 1:1,000,000 but smaller than 1:75,000
- Large; Those maps with scales of 1:75,000 and larger
Para 2-6
How many different types of maps are there?
Eight
Para 2-6
What are the Different Types of Maps?
- Planimetric Map
- Topographic Map
- Photomap
- Joint Operations Graphics
- Photomosaic
- Terrain Model
- Military City Map
- Special Maps
Para 2-6
What is a Planimetric Map?
map that presents only the horizontal positions for the features represented
Para 2-6
What is a Topographic Map?
a map that portrays terrain features in a measurable way (usually through use of contour lines), as well as the horizontal positions of the features represented
Para 2-6
What is a Photomap?
a reproduction of an aerial photograph upon which grid lines, marginal data, place names, route numbers, important elevations, boundaries, and approximate scale and direction have been added
Para 2-6
What is a Joint Operations Graphics?
maps based on the format of standard 1:250,000 medium-scale military topographic maps, but they contain additional information needed in joint air-ground operations
Para 2-6
What is a Photomosaic?
an assembly of aerial photographs that is commonly called a mosaic in topographic usage
Para 2-6
What is a Terrain Model?
a scale model of the terrain showing features, and in large-scale models showing industrial and cultural shapes
Para 2-6
What is a Military City Map?
a topographic map (usually at 1:12,550 scale, sometimes up to 1:5,000), showing the details of a city
Para 2-6
What is are Special Maps?
These are maps for special purposes, such as trafficability, communications, and assault maps
Para 2-7
What should you use if Military Maps are not available?
Substitute maps
Para 2-7
What can Substitute maps range from?
substitute maps can range from foreign military or commercial maps to field sketches
Para 2-7
How many types of Substitute maps are there?
Seven
Para 2-7
What are the Seven different types of Substitute Maps?
- Foreign Maps
- Atlases
- Geographic Maps
- Tourist Road Maps
- City/Utility Maps
- Field Sketches
- Aerial Photographs
Para 2-7
What are Foreign Maps?
maps that have been compiled by nations other than our own. When these must be used, the marginal information and grids are changed to conform to our standards if time permits
Para 2-7
What are Atlases?
collections of maps of regions, countries, continents, or the world. Such maps are accurate only to a degree and can be used for general information only
Para 2-7
What are Geographic Maps?
maps give an overall idea of the mapped area in relation to climate, population, relief, vegetation, and hydrography
Para 2-7
What are Tourist Road Maps?
maps of a region in which the main means of transportation and areas of interest are shown
Para 2-7
What are City/Utility Maps?
maps of urban areas showing streets, water ducts, electricity and telephone lines, and sewers
Para 2-7
What are Field Sketches?
preliminary drawings of an area or piece of terrain
Para 2-7
What are Aerial Photographs?
can be used as map supplements or substitutes to help you analyze the terrain, plan your route, or guide your movement
Para 3-1
Where would you find useful information that will help you read a map?
in the Marginal Information
Para 3-1
Where will you find information about the symbols found on a map?
in the Marginal Information
Para 3-1
What should a Soldier do prior to using a particular map?
the Soldier must read the instructions
Para 3-1
Where will you find the Sheet Name of a Map?
The sheet name is found in bold print at the center of the top and in the lower left area of the map margin
Para 3-1
Where will you find the Sheet Number of a Map?
The sheet number is found 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
Para 3-1
Where will you find the Series Name of a Map?
The map series name is found in the same bold print as the sheet number in the upper left corner of the margin
Para 3-1
Where will you find the Scale of a Map and what does it represent?
The scale is found both in the upper left margin after the series name, and in the center of the lower margin and it is a representative fraction that gives the ratio of a map distance to the corresponding distance on the earth’s surface
Para 3-1
Where will you find the Series Number of a Map?
The series number is found in both the upper right margin and the lower left margin
Para 3-1
Where will you find the Edition Number of a Map?
The edition number is found in bold print in the upper right area of the top margin and the lower left area of the bottom margin
Para 3-1
Where will you find the Index to Boundaries of a Map and what does it represent?
The index to boundaries diagram appears in the lower or right margin of all sheets and which is a miniature of the map, shows the boundaries that occur within the map area, such as county lines and state boundaries
Para 3-1
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
Para 3-1
Where will you find the Elevation Guide of a Map and what does it represent?
This is normally found in the lower right margin and It is a miniature characterization of the terrain shown
Para 3-1
Where will you find the Declination Diagram of a Map and what does it represent?
This is located in the lower margin of large-scale maps and indicates the angular relationships of true north, grid north, and magnetic north
Para 3-1
Where will you find the Bar Scales of a Map and what does it represent?
located 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
Para 3-1
Where will you find the Contour Interval Note of a Map Map and what does it represent?
found in the center of the lower margin normally below the bar scales. It states the vertical distance between adjacent contour lines of the map
Para 3-1
Where will you find the Spheroid Note of a Map Map and what does it represent?
located in the center of the lower margin. Spheriods (ellipsoids) have specific parameters that define the X Y Z axis of the earth
Para 3-1
Where will you find the Grid Note of a Map and what does it represent?
located in the center of the lower margin. It gives information pertaining to the grid system used and the interval between grid lines, and it identifies the UTM grid zone number
Para 3-1
Where will you find the Projection Note of a Map?
located in the center of the lower margin
Para 3-1
Where will you find the Vertical Datum Note of a Map and what does it represent?
located in the center of the lower margin and The vertical datum or vertical-control datum is defined as any level surface (for example, mean sea level) taken as a surface of reference from which to determine elevations
Para 3-1
Where will you find the Horizontal Datum Note of a Map and what does it represent?
located in the center of the lower margin and The horizontal datum or horizontal-control datum is defined as a geodetic reference point
Para 3-1
Where will you find the Control Note of a Map and what does it represent?
located in the center of the lower margin and It indicates the special agencies involved in the control of the technical aspects of all the information that is disseminated on the map
Para 3-1
Where will you find the Preparation Note of a Map and what does it represent?
located in the center of the lower margin and It indicates the agency responsible for preparing the map
Para 3-1
Where will you find the Printing Note of a Map and what does it represent?
located in the center of the lower margin and it indicates the agency responsible for printing the map and the date the map was printed
Para 3-1
Where will you find the Grid Reference Box of a Map and what does it represent?
normally located in the center of the lower margin and It contains instructions for composing a grid reference
Para 3-1
Where will you find the Unit imprint and Symbol of a Map and what does it represent?
The unit imprint and symbol is on the left side of the lower margin and It identifies the agency that prepared and printed the map with its respective symbol
Para 3-1
Where will you find the Legend of a Map and what does it represent?
lower left margin and It illustrates and identifies the topographic symbols used to depict some of the more prominent features on the map