Landscape and land cover dynamics in the Karnali Floodplain - Part 2


This exercise is divided into two parts and requires the use of LEOWorks.
 
We will continue working with the images 'Bardia_landsat_2002_band 7' and 'Bardia_landsat_1990_band 7'.
Generate still images by producing a Combined Image using Red for 2002 (band4), Green for 1990 (band4), and Blue for 1990 (band4).

The image displayed in red covers the situation in a Landsat ETM satellite image of 2 February 2002, and the image displayed in green and blue is the one recorded by the Landsat TM satellite on 8 November 1990. The stronger reflection of chlorophyll in the near infrared band 4 in 2002 leads to a reddish coloured vegetation in this combination.

1. Explain why. Is the change a result of time or just seasonal?

2. Explain the large, red patch in the upper part of the image.

3. What is the significance of the cyan colour?

 
 
 
Difference image: Red 2002, Blue-Green 1990 (BNP)
 
There is something especially interesting in this 'difference' image. Since the two images were acquired from different orbits (resulting in a different viewing angle) they have also strangely flipped in the image animation exercise. We can use this to visualise them in 3-D. For doing this you have to view your difference image (shown above) with a red-cyan glass and, as if by magic, you would see it in 3-D!

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Last update: 16 April 2013


Bardia National Park

 •  Introduction (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEM67NKRQJF_0.html)
 •  Location (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEMVZNKRQJF_0.html)
 •  Geology and soil (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEMH5OKRQJF_0.html)
 •  Weather and climate (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEMNGPKRQJF_0.html)
 •  People and settlements (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEMF3Q6UWJF_0.html)

Exercises

 •  Worksheet introduction (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEM5HQ6UWJF_0_ov.html)
 •  Overview - working on paper prints (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEM4JQ6UWJF_0.html)
 •  Bardia Region Overview - Image processing (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEMH8T6UWJF_0.html)
 •  Landscape and land cover dynamics in the Karnali Floodplain (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEMU4X6UWJF_0.html)
 •  Habitat suitability evaluation for rhinoceros in Bardia (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEM5LX6UWJF_0.html)

Eduspace - Software

 •  LEOWorks 3 (http://esamultimedia.esa.int/multimedia/LEOWorks3.exe)
 •  ArcExplorer (http://esamultimedia.esa.int/multimedia/eduspace/ae2setup.zip)

Eduspace - Download

 •  bardia.zip (http://download.esa.int/multimedia/eduspace/bardia_v2.zip)
 •  bardia_paperprints.zip (http://esamultimedia.esa.int/docs/eduspace/bardia_paperprints.zip)

Resources

 •  Useful links (http://www.esa.int/SPECIALS/Eduspace_Global_EN/SEMEIY6UWJF_0.html)