Refer to the topographic map - NSC Geography - Question 4 - 2019 - Paper 2
Question 4
Refer to the topographic map.
4.1.1 Is the topographic map an example of raster or vector data?
4.1.2 What is the difference between raster data and vector data?
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Worked Solution & Example Answer:Refer to the topographic map - NSC Geography - Question 4 - 2019 - Paper 2
Step 1
4.1.1 Is the topographic map an example of raster or vector data?
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Answer
The topographic map is classified as an example of vector data.
Step 2
4.1.2 What is the difference between raster data and vector data?
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Raster data is represented by pixels, cells, or grids and is used for continuous data. In contrast, vector data represents discrete features using points, lines, and polygons. This distinction leads to differences in resolution and the types of analysis that can be performed.
Step 3
4.2.1 What is remote sensing?
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Remote sensing is the process of obtaining information about the earth from a distance without touching or having physical contact with it. This technique employs various sensors to gather data about the surface and atmosphere.
Step 4
4.2.2 Name ONE factor in the remote sensing process that will affect the resolution of an image.
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One factor that can affect the resolution of an image is the number or size of pixels used in the imaging process.
Step 5
4.2.3 Why does image A have a higher resolution than image B?
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Image A has a higher resolution than image B because it utilizes smaller pixels or grid cells, allowing for more detail to be captured. Additionally, image A may also involve less shadowing and better weather conditions during the capture.
