Map and Compass

Malcolm CunninghamTararua Tramping Club

Getting a sphere onto a plane

(Mercator projection)

Transverse Mercator

Projection

Longitudinal lines

(N-S) not necessarily

vertical

There are three Norths

1. True or Geographic North

2. Grid North

3. Magnetic North

True North&

Grid North

Magnetic North

Map Legend

Scale

Map Coordinates

18

17

26 27

26 27

18

17

26 27

0 1 2 3 4 5 6 7 8 9 00 9 8 7 6 5 4 3 2 1 0

18

17

26 27

0 1 2 3 4 5 6 7 8 9 00 9 8 7 6 5 4 3 2 1 0

18

17

267178

Contour Lines

Index Contours

Scale

1.3 km

26 mm

26 mm = 1.3 km

6 mm = 0.3 km

MAP & COMPASS EXERCISE NO.1 ( Use map NZTopo50 BQ31)

A) Grid ReferencesWhat feature is at Grid Reference 382218 ?" " 412277?" " 363293?

B) Contour Lines1. In Grid Square 3732, if you walked in a N.W. direction from Ohau Hill Spot

Height 243m, would you be ascending or descending?2. Would you be crossing a steep slope or a gentle one?3. If you walked in a N.E. direction to Ohau P Light, would you be ascending or

descending?4. In Grid Square 3929, the lowest point is in which corner? NW, N, NE, E, SE, S,

SW, or W5. What height is it?6. Which way is the Waiariki stream running in Grid Square 3823 ?

C) Scale7. How far is it between Outlook Hill trig in 3725 and Mt Misery trig in 3927? 8. How far is it between Mt Misery trig in 3927 and Terawhiti Hill trig in 3629?

MAP & COMPASS EXERCISE NO.1 ( Use map NZTopo50 BQ31)

A) Grid ReferencesWhat feature is at Grid Reference 382218 ? Karori Rock light" " 412277? Golf course" " 363293? Terawhiti Hill

B) Contour Lines1. In Grid Square 3732, if you walked in a N.W. direction from Ohau Hill Spot

Height 243m, would you be ascending or descending? Descending2. Would you be crossing a steep slope or a gentle one? Steep3. If you walked in a N.E. direction to Ohau R Light, would you be ascending or

descending? Descending4. In Grid Square 3929, the lowest point is in which corner? NW, N, NE, E, SE, S,

SW, or W SW5. What height is it? 100m6. Which way is the Waiariki stream running in Grid Square 3823 ? 200o

C) Scale7. How far is it between Outlook Hill trig in 3725 and Mt Misery trig in 3927? 2100m8. How far is it between Mt Misery trig in 3927 and Terawhiti Hill trig in 3629? 3.5km

The Compass

Magnetic needle(north end is red)

Direction of travel arrow

Rotatable dial

Orienting lines

Orienting arrows

Index line (bearing)

Base plate

Scales along edge of

baseplate

Direction of travel arrow

Index line (bearing)

Rotatable dial

Base plate

Magnetic needle(north end is red)

Orienting arrows

Orienting lines

Taking a Bearing off a Map

1. Identify Present Position & Target

Present positionHut

1. Identify Present Position & Target

Present positionHut

TargetMt Misery

1. Identify Present Position & Target

Present positionHut

TargetMt Misery

1. Identify Present Position & Target

Present positionHut

TargetMt Misery

1. Identify Present Position & Target

Just past SESE is 135O

2. Align the Compass from Present Position to Target

3. Rotate Compass Dial to N-S Map Gridlines

3. Rotate Compass Dial to N-S Map Gridlines

Index line gives bearing

4. Read Bearing

1530

Index line gives bearing

4. Read Bearing

2. Align the Compass from Present Position to Target

3. Rotate Compass Dial to N-S Map Gridlines

Index line gives

bearing

4. Read Bearing

MAP & COMPASS EXERCISE NO.2 ( Use map NZTopo50 BQ31)1) What is at 490340? 2) What is at 469348 on the same map? 3) What bearing would I take to get from 1) to 2)? 4) As above to go from 2) to 1)? 5) How far is it from 1) to the centre of 2)? 6) What is at 432220? 7) From 2) what is the bearing to 6)? 8) Where am I if I can see the peak at 363293 at 266° and spot height 201m at 422352 at 354°?

Do you think I could really see these peaks from this point?

MAP & COMPASS EXERCISE NO.2 ( Use map NZTopo50 BQ31)1) What is at 490340? Kaukau

trig2) What is at 469348 on the same map? Airstrip3) What bearing would I take to get from 1) to 2)? 289°4) As above to go from 2) to 1)? 109°5) How far is it from 1) to the centre of 2)? 2.3km6) What is at 432220? Te

Kopehou7) From 2) what is the bearing to 6)? 196°8) Where am I if I can see the peak at 363293 at 266° and spot height 201m at 422352 at 354°? Makara School (427301),

Do you think I could really see these peaks from this point? Quartz Hill would block the view to 201m, while White Rock Hill would block the view to Terawhiti Hill

9) You are standing at Terawhiti Hill trig and wish to walk to the ore stamping mill at 375299. What grid bearing would you be walking on?

10) From Outlook Hill trig you want to walk to Mt Misery trig. What would the bearing be?

11) From Mt Misery trig to Terawhiti Hill trig what would the bearing be?

12) From Terawhiti Hill trig to spot height 329m in grid square 3630?

You are at Mt Victoria trig (BQ31 504268).13) What can you seen in the direction of True/Grid north?  14) What can you see in the direction of 341 degrees? 15) What is the feature at 162 degrees at approx. 4km?  16) What height are you at?  17) What bearing is Point Jerningham (511279) from here?  18) If you could see Johnston Hill (456294) at 300 degrees and the Trig A2LP (466259) at 258 degrees, where are you?  19) Find the direction you would go to Wellington Hospital, as the crow flies.

20) If you wanted to walk from Outlook Hill 378254 to Terawhiti Hill 363293, what routewould you take to get there? Could you describe the route for someone else to usewho doesn't have a map. ie Mention type of track, road, up, down, stream, ridge,directions, buildings etc.

21) Using information from the map, describe the journey from Te Kopahou Trig (432220) to the building at 405253 if you were to walk it in a straight line.Describe features you would see, vegetation, terrain etc.

9) You are standing at Terawhiti Hill trig and wish to walk to the ore stamping mill at 375299. What grid bearing would you be walking on? 62°

10) From Outlook Hill trig you want to walk to Mt Misery trig. What would the bearing be? 39°

11) From Mt Misery trig to Terawhiti Hill trig what would the bearing be? 307°

12) From Terawhiti Hill trig to spot height 329m in grid square 3630? 16°

You are at Mt Victoria trig (BQ31 504268).13) What can you seen in the direction of True/Grid north? Kaiwharawhara Point (504306) 14) What can you see in the direction of 341 degrees? Stadium (496294) 15) What is the feature at 162 degrees at approx. 4km? Airport terminal (515232) 16) What height are you at? 196 meters above sea level 17) What bearing is Point Jerningham (511279) from here? 28 degrees 18) If you could see Johnston Hill (456294) at 300 degrees and the Trig A2LP (466259) at 258 degrees, where are you? Mt Victoria lookout 19) Find the direction you would go to Wellington Hospital, as the crow flies. 213 degrees.

20) If you wanted to walk from Outlook Hill 378254 to Terawhiti Hill 363293, what routewould you take to get there? Could you describe the route for someone else to usewho doesn't have a map. ie Mention type of track, road, up, down, stream, ridge,directions, buildings etc.

21) Using information from the map, describe the journey from Te Kopahou Trig (432220) to the building at 405253 if you were to walk it in a straight line.Describe features you would see, vegetation, terrain etc.

Taking a Bearing in the Real World

Taking a Bearing in the Real World

Demo

Walking on a Bearing

Neil Challands Peggy Munn

Colin Basterfield Jackie Hawley

Megan Corby Jeff Macphail

Susan Basterfield Helen Chapman

Nicola Robertson Keith Schofield

Dave Grainger Chris Munn

Alison Craig Lucas Waterworth

Murray Goold Tracy Cook

Jacquie Harrison Grant Cornish

Janette Roberts

Mary Kang

Gim Tan

Tim Janes

Katie Cornish