lab8_Remote Sensing

lab8_Remote Sensing - Exercise 8 Remote Sensing...

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Exercise 8: Remote Sensing & Geomorphology REQUIRED MATERIAL 1. This lab manual. 2. Elemental Geosystems , 5th edition, 2007, by R. Christopherson. 3. Three Landsat digital images - provided in the computer laboratory. 4. Workstation running ENVI - provided in the lab. REQUIRED READING 1. This exercise—be familiar with all terms in bold . 2. Pages 25-31, 451-463, Chapter 11 in Elemental Geosystems . INTRODUCTION In this exercise, three Landsat satellite images showing parts of the Earth's surface are provided for analysis. The digital display of the images using ENVI software will reveal their landforms. Certain features need to be identified, explained, and sometimes sketched to illustrate their structures. Deductive reasoning will be necessary to interpret the images and for this reason a brief introduction to geomorphology and remote sensing is given below. Geomorphology Geomorphology is a major branch of geography. The term is derived from the word “geo,” which means “earth or planetary surface” the word “morphos,” which means “shape,” and the suffix “-ology” indicating “the study or science of”. Together, the word represents the study of the shapes of the planet surface. Geomorphologists study the spatial features and topography of the planetary surface, usually of the earth, but sometimes of other planets. Landforms such as mountains, floodplains, mountains, islands, canyons, coastlines, and volcanoes are examined by geomorphologists to determine how they developed and how they affect or are affected by
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the people and environments near them. The processes that create landscapes can be extremely complex and slow, but consistent. All areas of the earth are moving and changing through processes of uplift, erosion, sediment transport, deposition, compaction, volcanism, and tectonic shifting. Some of the processes which geomorphologists examine overlap with studies in similar disciplines such as geology, oceanography, climatology, and engineering but geomorphology's focus on the spatial development and influence of landforms places it firmly within the realm of geography. In this exercise, the geomorphologic features of three sites in North America will be examined using the tools of remote sensing and image processing. Satellite images of the three sites will be viewed and manipulated with the image-processing program ENVI to illustrate certain aspects of their landscapes. In the Grand Canyon, the effects of streamflow and erosion will be examined; in the delta of the Mississippi River, riverine and marine deposition will be observed and on Mt. McKinley/Denali, the land-forming processes of glaciation. These sites provide superb examples of the effects of processes that affect the geomorphology of the three areas. Remote Sensing
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lab8_Remote Sensing - Exercise 8 Remote Sensing...

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