Tuesday, May 22, 2012

Lab 6: DEMs in ArcGIS


For this lab, I created 4 different maps to display a region extending from Long Beach, CA to what I believe is around Downtown LA. I created a map of the original DEM with a hillshade layer, a slope map, an aspect map, and a map of the region through 3D rendering. The biggest reason I chose this area was to see how the elevation of the LA area varied from the beach to more inland. Through the hillshade and 3D rendering, the elevation appears to vary a bit towards the coast, but further inland, the elevation increases a lot, with a total variation from -5.23761 to 2861.88 decimal degrees.
The area is defined by the following decimal degrees according to GCS North American 1983 datum:
   Top:  34.3794
   Bottom:  33.6231
   Left:  -118.3906
   Right:  -117.7419

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