7.5 Coastal Management on the Gold Coast

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7 Express the scale of the map as a statement: One centimetre on the map represents kilometres on the ground. one centimetre on the map represents 250m on the ground.

8 What is the contour interval of the map? 10m

9 Calculate the following:

a the width of the mouth of the Tweed River 250m

b the length of the breakwater on the southern side of the Tweed River 2.25km

c the length of the jetty extending into the ocean from the sand pumping station in AR 5483 50m

d the distance along the beach from the lookout at Greenmount Hill to the Rainbow Bay surf club 500m

e the time it would take you to walk along the beach from the Rainbow Bay surf club to the Coolangatta Beach surf club if you were walking at a speed of 5 kilometres per hour. 15 minutes

10 Which is higher, the lighthouse at Point Danger or the lookout on Kirra Hill? the lighthouse

11 What is the aspect of the slope where the electricity substation is located in AR 5283? Westerly aspect

12 What is the approximate height of the small electricity substation in AR 5283? Roughly 20m

13 Name the human features located at the following grid references:

a 532824 secondary paved road

b 536823 Bridge

c 541844 Lighthouse

d 513834 Border Park Raceway

e 528819 Caravan Park

f 532828 Jetties

14 Name the natural features located at the following grid references:

a 524818 Boyd's Island

b 537822 Terranora Inlet

c 514844 Beach

d 521833 Mount Murraba

e 544817 Sandy Island

f 544839 Mouth of Tweed River;.

15 Refer to 7.24 and the topographic map. Give the grid reference of the lookout that the photographer was standing at when the photograph was taken. 522842

16 What is the density of buildings in AR 5483? low density

17 Which area has the greatest density of buildings per square kilometre—AR 5281 or 5282? Give a reason for your answer. 5282 has a much higher density. Where 5281 only covers half the grid square, 5281 covers a lot more of the grid square and has a the same density of buildings as 5281 did. So with the same density but covering am much larger area 5282 is a the more dense area.

18 Estimate the bearing of the following features from the water tank on the top of Mount Murraba:

a the groyne at Kirra Point North30degreesWest

b the mouth of the Tweed River North60degrees East

c Boyds Island South15degreesEast

d Snapper Rocks * North45degreesEast