CONS127_Assignment5__2024_JF2

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University of British Columbia *

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127

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Geography

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Apr 3, 2024

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pdf

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1 Cons 127 Observing the Earth from Space Assignment 5: Visualizing Landscapes in Space and Time Instructor: Chris Colton (chris.colton@mail.ubc.ca) Office: FSC 2223 TA: Julia Fast (j.fast@oceans.ubc.ca) Office: AERL 335 | Office hours: Please see the zoom page on the CONS 127 canvas site for office hour details. Objectives • Learn how to analyze features in satellite images • Articulate how (and possibly why) those features have changed through time • Learn how to search and download Landsat images Deliverables • Answers to questions 1 through 11 • Submit your answers to the Assignment 5 Quiz • You can upload your own image to the corresponding question in the Canvas Quiz. Websites used • https://earthexplorer.usgs.gov/ – Download satellite imagery Note The Landsat images that we will be analyzing during this lab are called LandsatLook Natural Color Images . They are a false-color composite images that simulate a “natural” looking image. You can find details here: https://www.usgs.gov/land-resources/nli/landsat/landsatlook-images
2 1. We are going to begin by inspecting and interpreting Landsat images acquired over different landscapes. Q1. Assign the Landsat images shown in Figure 1 to the following land cover classes: urban area, agricultural lands, and mountain range. Figure 1 Landsat Natural Look Images of different types of land cover.
3 2. We are now going to see how Landsat images can be useful to observe landscape changes over time. The Landsat images in Figure 2 show the city of Shanghai, China, in 1990 and 2018. The images of 1990 and 2018 were acquired by Landsat 5 (TM) and Landsat 8 (OLI) respectively. Note that slight color differences could be caused by different sensor specifications and atmospheric conditions. Q2. What do the observed changes imply concerning the socio-economic development of Shanghai between 1990 and 2018? Select the correct answers. Multiple answers can be selected. o Urban sprawl o More transportation infrastructure o Less urban green space o More shoreline development o Deforestation Figure 2 LandsatLook Natural Color Image (Path 118, Row 38) showing the city of Shanghai in 1990 (top) and 2018 (bottom).
4 Q3. The Landsat images in Figure 3 show a part of Yangzi River in China in 1989 and 2018. Is there evidence in the image that could explain the observed differences? Name the responsible feature, use 1 word. You may use additional resources ( link ). Figure 3 LandsatLook Natural Color Image (Path 125, Row 39) showing the Yangzi Jiang river in 1989 (top) and 2018 (bottom).
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