3-Dimensional Representations of Surface Area
This week’s lab consisted of creating four digital elevation
models (DEM) in ArcGIS. The four model types are: shaded relief, slope layer,
aspect layer, and 3-Dimensional surface area. What seems to be a mountain range located in the southeastern United States has an area and extent range that covers from: top:: 39.8291666661 degrees; bottom:: 39.3838888883 degrees;
left:: -105.788888889 degrees; and right:: -104.969444445 degrees. For this data set, the GCS
North American 1983 defines the coordinate system being used.
Creating 3-D models
and exploring the analytic capabilities of ArcGIS is excellent for seeing
models in different ways. For example, in ArcScene one can use the flying
option to navigate through the projected 3-D model to achieve angles not ordinarily
possible by mouse manipulation. With such options, one model can begin to look
new in many ways as each analytic tool presents new perspectives and discoveries
through stored data found within the layers.
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