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3.1.1 In which province is Phalaborwa? 3.1.2 31 in the map index 2331CC refers to .. - NSC Geography - Question 3 - 2021 - Paper 1
Question 3
3.1.1 In which province is Phalaborwa? 3.1.2 31 in the map index 2331CC refers to ... A. longitude. B. latitude. C. graticule. D. code. 3.1.3 What is the map index... show full transcript
Worked Solution & Example Answer:3.1.1 In which province is Phalaborwa? 3.1.2 31 in the map index 2331CC refers to .. - NSC Geography - Question 3 - 2021 - Paper 1
Step 1
Step 2
Step 3
Step 4
Calculate the area covered by feature 6 in blocks D4/5 and E4/5 on the orthophoto map in m².
Answer
To calculate the area, you first need to measure the length (L) and breadth (B) of feature 6 on the orthophoto map. Once you have these measurements, use the formula:
Substituting the measured values will give you the area in square meters.
Step 5
Why does feature 6 appear larger on the orthophoto map than on the topographic map?
Answer
Feature 6 appears larger on the orthophoto map due to the scale of representation. Orthophoto maps often provide a more detailed and accurately scaled view of features, leading to a perceived larger size compared to topographic maps that may generalize terrain at different scales.
Step 6
Determine the true bearing from spot height 445, in block A4 to spot height 421, in block C4 on the topographic map.
Answer
To determine the true bearing, measure the angle formed between true north and the line connecting spot height 445 and spot height 421. Use a protractor or compass to accurately gauge this angle on the map.
Step 7
The magnetic declination for 2021 is 17°10' west of true north. Use the true bearing in your answer to QUESTION 3.1.6 to calculate the magnetic bearing.
Answer
To find the magnetic bearing, subtract the magnetic declination from the true bearing calculated in the previous step. If the true bearing was, for example, 60°, the calculation would be: