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 a Building. This is indicated by the presence of structures in the area, which are identified in topographical maps as buildings.
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. This is a standard interval that allows for effective representation of elevation changes in topographical 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. This number helps in identifying specific maps used for reference purposes.
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: Area = Length x Breadth. If the length is 0.9 cm and breadth is 0.7 cm, then:
extArea=0.9extmimes0.7extm=0.63extm2
Step 5
Calculate the average gradient from block D4 to D7 in spot height 1500 D2.
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Answer
The average gradient can be calculated using the formula:
Where the vertical interval is the difference in spot heights between D4 and D7, and HE is given as 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 between the blocks is a Concealed Slope. This occurs when one area is obstructed from view by geographic features like hills or valleys.
