NSC Geography Geographical information systems – GIS: 4.1.1 Explain the term resolutio

Question

4.1.1 Explain the term resolution.

Resolution refers to the detail and accuracy of an image/photo. Higher resolution means that the image has a greater level of detail, allowing for clearer visual interpretation.

4.1.2 Give evidence that the orthophoto map has a high resolution.

All features are clear and distinguishable, indicating that the map provides a high level of detail for effective analysis.

4.1.3 Why one can say that the orthophoto map is an example of raster data?

It is a photograph and therefore consists of pixels/digital blocks.

4.2.1 Explain the term remote sensing.

Remote sensing is the collection of information of the Earth’s surface from a distance e.g. via satellites.

4.2.2 Explain how the local municipality will use remote sensing to monitor the negative impact of the increased erosion on the Bonkolo Dam.

The local municipality can use satellite technology to continuously take photos of the area at different times. By comparing these photos, they can observe the expansion of erosion and analyze the implications for the Bonkolo Dam. This data can then be utilized for effective land management and mitigation strategies.

4.3.1 Give TWO data layers, evident on the topographical map, that you would use to assist you in making your choice.

1. Infrastructure, such as the National Road N6.
2. Topography or Flat land.

4.3.2 Name your final choice.

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4.4.1 Explain the term data integration.

Data integration is the combining of different sources of information to give the user a unified view, facilitating better decision-making.

4.4.2 Name TWO sources that could have been used to obtain information to produce this sketch map.

1. Topographical map.
2. Satellite photographs.

4.4.3 State ONE problem that a cartographer could have experienced when producing this sketch map.

For instance, they may encounter difficulties in getting the scale accurate while using maps with different scales.

4.1.1 Explain the term resolution - NSC Geography - Question 4 - 2016 - Paper 2

Worked Solution & Example Answer:4.1.1 Explain the term resolution - NSC Geography - Question 4 - 2016 - Paper 2

Explain the term resolution.

Give evidence that the orthophoto map has a high resolution.

Why one can say that the orthophoto map is an example of raster data?

Explain the term remote sensing.

Explain how the local municipality will use remote sensing to monitor the negative impact of the increased erosion on the Bonkolo Dam.

Give TWO data layers, evident on the topographical map, that you would use to assist you in making your choice.

Name your final choice.

Explain the term data integration.

Name TWO sources that could have been used to obtain information to produce this sketch map.

State ONE problem that a cartographer could have experienced when producing this sketch map.

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