Term
| what publication covers " map reading and land navigation" |
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Definition
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Term
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Definition
| A graphic representation of a portion of the earths surface drawn to scale, as seen from above |
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Term
| what is meant by the scale of a map? |
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Definition
| the scale is expressed as a fraction and gives the ratio of map distance to ground distance |
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Term
| what are some examples of different types of maps? |
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Definition
a. topographic
b. planimetric
c. photomap
d. joint operations graphics (JOG)
e. photomosaic
f. terrain model, military city, and special |
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Term
| Name some items of information that maybe contained in the margin of a military map |
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Definition
| Sheet name, sheet number, serires name scale, series number, edition number, index tou boundaries, adjoining sheets diagram, elevation guide, declination diagram, bar scales, contour interval note, vertical datum, horizontal datum, grid reference box, speicial note, legend |
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Term
| where does a map get its name and where is the "sheet name" located? |
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Definition
| a map is named after the most prominent cultural or geographical feature. Whenever possible, the name of the largest city on the map is used. The sheet name is found in bold print at the cente rof the top and in the lower left aresa of the map margin. |
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Term
| Identify the colors used to facilitate the identification of features on a miltiary map |
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Definition
a. black- indicates cultural (man-made) features other then roads
b. blue- identifies hydrography or water features such as lakes, swamps, rivers and drainage.
c. brown- identifies all relief features and elevation, such as contoiurs on older edition maps, and cultivated land on red-light readable maps.
d. green- identifies vegetationwith military signifigance, such as woods, orchards, and vineyards.
e. red- classifies cultural features, such as populated areas, main roads, and boundaries, on older maps.
f. red brown- the colors red and brown are combined to identify cultural features, all reliefe features, non-surveyed spot elevations, and elevation such as contour lines on red-light readable maps. |
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Term
| what is the principlie for reading grid coordinates on military maps? |
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Definition
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Term
| How many digits are required to locate a point to within 1000 meters? |
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Definition
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Term
| How many digits are required to locate a point to within 100 meters |
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Definition
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Term
| how many digits are required to locate a point to within 10 meters? |
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Definition
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Term
| How many digits are required to locate a point to within 1 meters? |
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Definition
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Term
| what are three things should you remember when measuring distance on a map? |
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Definition
a. measure center of mass to center of mass
b. use the correct graphic scale
c. use the same side of the raod, or river, etc, when measuring curve-line distance |
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Term
| what is the graphic (bar) scale on a map used for? |
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Definition
| to convert distances on the map to actual ground distance |
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Term
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Definition
| a horizontal angle measured in a clockwise manner from a north base line |
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Term
| what is meant by base line? |
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Definition
| the starting point or point of reference from which a unit of measure is taken |
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Term
| how many base lines are there on a military map and what a re they? |
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Definition
THREE
a. true north
b. magnetic north
c. grid north |
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Term
| What are the two most commonly used base lines? |
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Definition
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Term
| describe the three norths on a military map |
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Definition
a. true north- a line from any point on the earth's surface to the north pole. true north is usually represented by a line with a star at the apex
b. magnetic north- the direction to the north magnetic pole, as indicated by the north seeking needle of a magnetic instrument.
c. Grid north- the north that is established by using the vertical grid lines on the map. Grid North is usually symbolized by the letters GN or the letter y at the apex. |
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