Tenino Map Practical Application

1
Tenino Map Practical Application

• 1. Recognize Terrain Features
• 2. Measure Distance (Straight Line Road)
• 3. Read Grid Coordinates
• 4. Determine Elevation
• 5. Convert Magnetic Azimuth
• 6. Find Unknown Location by Resection

2
Note Grid Lines (Read Right and up)
Read up 78
Note Meter Scale
Read Right 15
Note Miles Scale
Note Contour Interval
Note G-M Angle
Back Azimuth Add or Subtract 180
Note Map Number
3
Practical Exercise 1 1. Recognize
Terrain Feature (Hill Top) 2. Identify
Grid Square

• Look at the lower left hand corner of your map,
  and locate Hill Top 192.
• What grid square is Hill Top 192 located in?

4
Answer

• How many of you had EG0279 ?
• (If you forgot the EG, your answer is
  incorrect.)

5
Determine Eight-Digit Grid Coordinates(Note
Position of Protractor)
6
Practical Exercise 2 Find Eight-Digit Grid
Coordinates

• What are the Eight Digit Grid Coordinates for
  Hill Top 192?

7
Answer

• How many of you came up with EG 02457910 ?

8
Practical Exercise 3Identify Terrain Feature

• What natural terrain feature is at grid
  coordinate EG06109015?

9
Answer

• Depression

10
Practical Exercise 4 Identify Terrain Feature

• Locate north/south grid line 15 at the bottom of
  your map.
• Follow it up six grid squares.
• What man-made Terrain Feature do you see in this
  grid square? (Remember Read Right Up)

11
Answer

• How many have Mine or Quarry?

12
Practical Exercise 5Determine Eight-Digit Grid
Coordinates

• What are the eight-digit grid coordinates of the
  mine or quarry you have just located?

13
Answer

• How many have EG15818215?

14
Measure Straight-line Distance
Match tick marks on paper strip against map scale.
15
Practical Exercise 6Measure Straight-line
Distance in Meters

• What is the straight-line distance in meters
  between the water tower in grid square EG11558558
  and the oil tank in grid square EG08359360?

16
Answer

• How many have 8,630 meters?
• (/- 100 Meters)

17
Practical Exercise 7Measure Straight Line
Distance in Miles

• What is the distance in miles between those same
  two points?
• (Use Statute Miles Scale, not Nautical
  Miles Scale)

18
Answer

• 5.4 Statute Miles (/- .10 miles)

19
Measuring Curved Line Distance(As with Roads)
Move and change angle of paper strip, as you move
along road.
20
Practical Exercise 8Measure Road Distance

• What is the road distance in meters between the
  river bridge in grid square EG10408840, southwest
  to the road junction in grid square EG03108525,
  at the Church of God?

21
Answer

• 8,000 meters (/- 100 meters)

22
Determine Elevation
Locate point on the map Determine contour
interval of map Locate index contour line nearest
point Count number of contour lines up or down
that must be crossed to get to point Points at
top of hill add half the contour interval Points
at bottom of depression subtract half the contour
interval
23
Practical Exercise 91. Recognize Natural
Terrain Feature2. Determine Elevation

• What type of natural terrain feature is at grid
  coordinate EG16107925? (Look closely, before
  identifying)
• What is its height in meters?

24
Answers

• Saddle
• 150 meters (/- 10 meters)
• (Did you remember what the contour interval is
  on the Tenino Map?)

25
Practical Exercise 101. Recognize a
Natural Terrain Feature2. Determine
Elevation

• What natural feature is found at grid coordinate
  EG17078440
• What is its elevation in meters?

26
Answers

• Hill Top
• 310 Meters

27
Convert Magnetic Azimuth

Check Here on Your Tenino Map for GM Angle
Instructions
28
Practical Exercise 111. Convert Magnetic
Azimuth 2. Determine Eight-Digit Grid
Coordinates3. Measure Straight line distance4.
Recognize Manmade Feature

• An observer at the Crawford Mountain Lookout
  Tower, in grid square EG1887 sees a convoy parked
  on a light duty road. The magnetic azimuth from
  his position to the convoy is 260 degrees, a
  distance of 15,820 meters. What is the
  eight-digit coordinate of the convoy.

29
Answer

• EG02509065
• (/- 50 meters)
• (50 meters EG02559070)
• ( -50 meters EG02459060)

30
Practical Exercise 12 1. Convert Magnetic
Azimuth 2. Find Unknown Location.

• You are at the church of God in grid square
  EG0385 and observe an automobile accident on
  Interstate 5. The magnetic azimuth from your
  position to the cars is 331 degrees. What is the
  eight-digit coordinate of the accident?

31
Answer

• EG02329010
• (/- 50 meters)
• ( 50 meters EG23379015)
• (- 50 meters EG02279005)

32
Determine Unknown Location on Ground by Resection

• Step 1 Identify Two Or Three Distant Locations
  on the Ground and Mark them on the Map
• Step 2 Shoot a Magnetic Azimuth to the Distant
  Locations
• Step 3 Convert the Magnetic Azimuths to Grid
  Azimuths
• Step 4 Compute the Back Azimuths
• Remember
• a. If Converted Grid Azimuth is less
  than 180 , add 180 .
• b. If Converted Grid Azimuth is more
  than 180, subtract 180

33
Practical Exercise 131. Locate Unknown Point
on Ground by Resection

• You are trying to determine your unknown
  location. You determine the magnetic azimuth to
  TV relay tower in grid square EG1287 to be 204
  degrees and the magnetic azimuth to Crawford
  Mountain Lookout Tower in grid square EG1887 to
  be 129 degrees. What is your location to the
  nearest 50 meters?

34
Answer

• EG15859120
• (/- 50 meters)
• 50 meters EG15909125
• - 50 meters EG15809115
• (Did you remember to first add the G-M Angle, and
  then subtract or add 180 degrees?)

35
Practical Exercise 14 1. Identify Manmade
Feature 2. Convert Magnetic Azimuth 3.
Measure Straight Line Distance 4. Determine
Grid Coordinates

• What manmade feature is on a magnetic azimuth of
  119 degrees at a distance of 5,700 meters from
  bench mark 86 in grid square EG0589?

36
Answer

• Water tank (EG09358529)

37
QUESTIONS?