3.3 GEOGRAPHICAL INFORMATION SYSTEMS (GIS) Refer to the photograph below. (Source: https://montgomerylandsurveying.com/drone-surveying 3.3.1 Which GIS method did the aeroplane above use to gather information? (1 x 1) 3.3.2 Images from the aeroplane were used to make the topographic map. Explain how South African topographic maps are standardised. (1) (1 x 2) (2) Refer to the topographic map. 3.3.3 Mention ONE way in which primary data can be collected to do an environmental impact study to evaluate the influence of soil erosion in block D5. (2 x 1) (2) 3.3.4 Soil erosion in block D5 can affect the farming area T. Mention TWO data layers in block D5 that GIS specialists can use to stop the spread of soil erosion. (2×1) (2) (1x1) (1) 1301 3.3.5 Identify the line feature that was used to limit the impact of erosion on farm area T.​