Marginal Information
Series Name (Upper left) Sheet Name (Upper Middle), Sheet Number (Upper Right)
Index to Adjoining Sheet
shows which map it is in reference to 8 others around it
Topographical Map
a graphic representation of all or part of the Earth's surface drawn to scale as seen from above, and is red light readable used by military
GM Angle (Grid Magnetic)
21�
Declination Diagram
Shows the three Norths and the GM Angle
Grid North
direction that is aligned with the map
True North
add gm angle from grid north
Magnetic North
north based on a compass
Scale
1:50000
Which scale do you use (miles, nautical miles, meters, yards?
Meters
Contour Lines (brown)
represent 20 meters elevation
Supplementary Contour Lines (dotted lines)
represent 10 meters elevation
Grid Reference Box
shows you how big the grid square is
Latitude
North and South (up and down)
Longitude
East and West (left and right)
How big is one grid square on a topographical map?
1000 meters x 1000 meters
Legend
Tell what symbols on map represent (located at bottom left corner)
Colors on Map
Blue, Black, Brown, Green, Red, Red-Brown
Blue
Water features (streams, intermittent streams, lakes or ponds, intermittent lakes or ponds, other bodies of water)
Black
Man made features (trails, prominent fences, single track RR, double track RR, buildings, schools, churches, mines)
Brown
contour lines
Green
vegetation (marshes or swamps, grasslands, woods, vineyards or orchards)
Red
Man Made features (heavy duty roads, usually roads, hard surfaces, improved/unimproved roads)
Red-Brown
Cultural features and non-surveyed spot elevations
Major Map Features
Hill, Saddle, Valley, Ridge, Depression
Minor Map Features
Draw, Spur, Cliff
Supplementary Map Features
Cut, Fill
Depression
hole found on the face of the earth, looks like a circle with tick marks on the inside
Hill
contour lines that looks like a honey bun with low slope
Ridge
a long, narrow, conspicuous elevation of land, looks like "V" on map or two hills
Saddle
found between two hilltops, looks like 2 fried eggs
Valley
area of low land between hills or mountains, water or greenery usually around or directly through
Draw
between spurs, looks like v but with water and lower elevation
Spur
makes draws, looks like a v with higher elevation pointing
Cliff
steep, almost vertical slope, looks like bacon
Cut
hole through mountain, usually for railroads, looks like a red line with tick marks going in
Fill
takes space of where they cut in mountain, looks like a red line with tick marks going out
Square Identification: where are EH and EG (00)
EH is above, EG is below
True or False-As contour lines are more spread apart, the steeper the hill is.
False
What is the cardinal rule of Map Reading?
read right, then up
How do you find distance using pencil/paper, the meter scale and 2 points?
use paper to measure distance, draw using tick marks, then move that distance to the scale (if longer on paper than 5000 meters, do it again; if it is less than 1000 meters, use the meters to the left of the 0)
Grid to Magnetic (add or subtract GM angle?)
subtract (21�)
Magnetic to Grid (add or subtract GM angle?)
add (21�)
Back Azimuth (how do you find it?)
if angle is less than 180�, add 180�; if angle is greater than 180�, then subtract 180�