TC 3-25.26 Part 1 Flashcards
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 is the purpose of a map?
provides information on the existence of the location and the distance between ground features, such as populated places and routes of travel, and communication
What scale is a small map?
1: 1,000,000 and smaller in scale
What scale is a medium map?
1:1,000,000 to 1: 75,000 in scale
What scale is a large map?
anything greater than 1:75,000
What is the typical scale of a map used for land nav?
1: 50,000
name three types of maps
Topographic map, Digital map, and Planimetric map
Where is the scale of a map located?
The upper left margins
Where is the elevation of a map located?
Lower right margins
Where is the bar scale located on a map?
The Center of the lower margins
Where is the legend located on a map?
Lower Left Margins
Where is the sheet name located
Upper center of the Margins
What are the colors of a map?
Black Blue Brown Red-Brown Red Green
What does black mean on a map?
Man made objects
What does blue mean on a map?
Water
What does brown mean on a map?
Contour Lines and relief features or cultivated land
What does red-brown mean?
Contour lines and relief features under a red light
What does green on a map mean?
Vegetation
What does red mean on a map?
Roads and boundaries
What is a latitude line?
a line on a map traveling north to south
What is a longitude line?
a line on a map traveling east to west
How big is a grid square on a large map?
1km By 1km
How do you determine your pace count?
Counting how many paces it takes you to get to 100 meters
What are the three norths?
True North, Magnetic north, grid north
What is true north?
north that is normally pointed out by a star
What is magnetic north?
North that is pointed out by a compass
What is grid north?
North as seen on a map
What is an Azimuth?
horizontal angle measured clockwise from a north base line
What is an intersection?
location of an unknown point by successively occupying at least two (preferably three) known positions on the ground, and then map sighting on the unknown location
What is a resection?
locating one’s position on a map by determining the grid azimuth to at least two well-defined locations that can be pinpointed on the map
What is modified resection?
locating one’s position on the map when the person is located on a linear feature on the ground, such as a road
