Monday, November 15, 2010

Lab Assignment #6: Using DEM's in ArcGIS


DEM Maps of the Island of Kauai






Description of the Area:

Kauai is the oldest of the main Hawaiian Islands and is the fourth largest, with an area of 562.3 square miles. Kauai originated from volcanic activity, as did the rest of the Hawaiian archipelago. The highest peak on the island of Kauai is Kawaikini, which has an elevation of 5,243 feet. The area east of Mount Wai’ale’ale has an annual average rainfall of 460 inches, which has eroded deep valleys and canyons in the midst of the mountain range. The Waimea Canyon, formed by the flow of the Waimea River, is 3,000 feet deep, earning it the title of “The Grand Canyon of the Pacific”. This contrast of high mountain peaks and deep canyons within such a small area makes Kauai the perfect subject for a digital elevation model (DEM).
The maps below illustrate the island of Kauai which lies between 22.222° (top) and 21.907° (bottom), and -159.738° (left) and -159.293° (right). The geographic coordinate system used is GCS North American 1983.


Shaded Relief Model above a Hillshade Model


Slope Map of Location


Aspect Map of Location


3D Image of Location


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