Which human-made feature is found at grid reference 31°49'41"S; 26°45'35"E on the topographical map?
A - NSC Geography - Question 3 - 2023 - Paper 1
Question 3
Which human-made feature is found at grid reference 31°49'41"S; 26°45'35"E on the topographical map?
A. Trees
B. Spot height
C. Ruin
D. Building
The contour interva... show full transcript
Worked Solution & Example Answer:Which human-made feature is found at grid reference 31°49'41"S; 26°45'35"E on the topographical map?
A - NSC Geography - Question 3 - 2023 - Paper 1
Step 1
Which human-made feature is found at grid reference 31°49'41"S; 26°45'35"E on the topographical map?
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Answer
The human-made feature found at the specified grid reference is likely a 'Building' (Option D), as this area typically hosts human habitation.
Step 2
The contour interval on the orthophoto map is ... metres.
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Answer
The contour interval on the orthophoto map is 10 metres (Option B), which is a common scale in such maps.
Step 3
The photo number for the orthophoto map of NOOITGEDACHT is ...
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Answer
The photo number for the orthophoto map of NOOITGEDACHT is 31 (Option A), which is pertinent for referencing.
Step 4
Calculate the area in m² of the frame labelled F in block E3 on the topographical map.
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Answer
To calculate the area, use the formula:
extArea=extLengthimesextBreadth=0.9extmimes0.7extm=0.63extm2
Step 5
Calculate the average gradient from D4 to D7 in spot height 1507 D4.
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Answer
To find the average gradient, we use the formula:
ext{Gradient} = rac{ ext{Vertical Interval (VI)}}{ ext{Horizontal Equivalent (HE)}}. Here, the average gradient would be calculated by subtracting the lower elevation from the higher elevation and dividing by the HE of 950 m.
Step 6
There is no intervisibility between 8 in block D4 and 9 in block D2 on the orthophoto map. Name the type of slope responsible for this.
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Answer
The type of slope responsible for the lack of intervisibility is known as a 'concave slope', as it can obstruct views between the two points.
