Grids, Maps & Positions as 12.3.4 12.3.2

8/4/2019 Grids, Maps & Positions as 12.3.4 12.3.2

1/13

Grids, MapsGrids, Maps

& Positions& Positions

A S 12.3.4; 12.3.2


2/13

Where am I now?

Where am I going?

Global Positioning System (GPS) devicesare wonderful instruments. They allow youto pinpoint your location to within a fewmeters, no matter where you are on planet

Earth!The GPS gives the information in terms oflatitude and longitude which is measured in

degrees, minutes and seconds.


3/13

Latitude is the position north orsouth of the Equator (0o). Lines

run in an East - West direction.The North Pole is assignedlatitude 90o N and the SouthPole latitude 90o S.

Lines of longitude, or meridians,run in a North - South direction.The line of longitude (primemeridian) 0, passes throughGreenwich in London. There are180o to the east and to the west

of this line.


4/13

Match the letters corresponding to the following:

20 South, 20 East

60 South, 40 West

0, 140 W

20 S, 100 E

50 North, 120 East

F

D

I

C

A

5 S, 40 W J


5/13

Each degree of latitude or longitude in dividedinto 60 minutes and each minute into 60

seconds e.g. 200 13 25 E.Convert the following co-ordinates into degrees.

190 14,5 N ; 1560 15,7 W

14,5/60 0,24 and15,7/60 0,26

19,240 N ; 156,260 W

210 10 5 S ; 330 25 29 E 20,170S ; 33,420E

Calc:21 D

0MS 10 D0MS 5 2ndF D0MS

33 D0

MS 25 D0

MS 29 2nd

F D0

MS


6/13

Convert the following degrees into deg, min, sec

25,220 N ; 12,510 E

5 , 20 ; 15,2 0 E

Convert 62,660 N ; 112,320 W

to deg min sec.

0,22x60 = 13,2 0,2x60 = 120,51x60 = 30,6 0,6x60 = 36

250 13 12N ;120 30 36E

Task

5 0 12 ;150 16 E

Calc:

5 . 2 2ndF D0M

15.2 2ndF D0M


7/13

Source:enchantedlearning.com

Hawaii

Lanai

Moving closer to

equator, 0

0

.

E450

S

Name the largestisland?

Which island is farthest west?

In approximate what direction would you travel togo from Kahului to Red Hill?

The latitude values

decrease from top tobottom. Why?

CheckpointCheckpoint


8/13

What is the approximate distance,

in km, from Hilo to Kailua?

20oN, 157oW.

State the co-ordinates of X.

50 x 1,6

= 80km

At approximatelywhat bearing would

you fly from Hilo toCaptain Cook?

2250

What is situated at or near200 32,3 N , 1560 30,4 W Kahoolawe Island

1 mile = 1,6 km


9/13

Lat N 200 0Lon W 1570 0

Lat N190 14,5Lon W1560 15,7

The screens from aGPS show latitudeand longitude of aship nearing aharbour. Use the

GPS readings tomark the path anddirection of the ship.

Which coastaltown is it nearing?

Lat N190 28,5

Lon W1560 29,7

Lat N190 17,8

Lon W1560 8,1

Kailua

X


10/13

The earth rotates 360 degrees from East to

Westevery 24 hours i.e. 150 longitude everyhour. When it is noon at Greenwich, it is 10:00a.m. at 300 W. and 2:00 p.m. at 600 E.

Longitude and TimeLongitude and Time

EW

City A is on the 700W line of longitude atmidnight. What is the time in city B if it is on the400W line of longitude?

Both West: difference = 70 30 = 300

Hours = 30/15 = 2hB is east of A later

Time in B = midnight + 2 = 2 a.m.

GMT +-


11/13

Tokyo, Japan is located at 3541 N; 13946 E

while Sante Fe is at 3537

'N; 106

5'W. It is4 p.m. in Sante Fe, what is the time in Tokyo?

Cities on opposite side of prime meridian.Longitude difference = 1060 5+ 1390 46

= 2450 51

No hours = 245 51/15= 16h 23 24

Tokyo is East of Santa Fe

later timeTime in Tokyo = 16h00 + 16h 23 24= 8h 23 23 a.m. next day

Use calculator


12/13

Which coastalcity sees thesun rise first?

Durban

Which coastalcity has thelatest sunset?

Cape Town

CheckCheck

The longitude and latitude lines are not completelyparallel. Why?

Earth is curved


13/13

Which city isat about

250S;290E?

Pretoria

What is theapproximateposition ofBloemfontein?

280

S;260

EYou have a GPS in your car. Both thelongitude and latitude readings areincreasing at the same rate. In what

direction are you travelling? Explain.

Task

Documents

Grids, Maps & Positions as 12.3.4 12.3.2