LAB 5, MAHIN AHMED, 42123224 (2).pdf

LAB 5, MAHIN AHMED, 42123224 (2).pdf - MAHIN AHMED 42123224...

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MAHIN AHMED 42123224 LAB 5 1. What is the formula for the NDVI ? NDVI = 𝑁𝐼𝑅−𝑅?? 𝑁𝐼𝑅+𝑅?? 2. Which Landsat bands are used to calculate the NDVI? (Specify which Landsat is used to answer this question)? Landsat comprises of 7 distinct bands that ranges from visible light region of the electromagnetic spectrum to the thermal infrared region. Landsat uses band 4, which is located near the infrared spectrum within a range of 760nm to 900nm. (Landsat 7 is specifically used to answer this question). 3. Has there been a change in vegetation between the two images? Vegetation can be seen to have increased near the Gilford Pinchot National Forest region and South of the volcano but diminished from North of the volcano towards West of the Spirit Lake. See Figure 1 in attachment. 4. Where has vegetation increased (North, south, east or west)? Vegetation seems to be increased both in he South-eastern and South-western regions. 5. Where has it decreased (North, south, east or west? ) Vegetation seems to have decreased in the North.
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  • Spring '16
  • Carroll
  • Infrared, NDVI, Normalized Difference Vegetation Index

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