Thursday, May 24, 2012

DEM's

Digital Elevation Models





   The area I chose for my DEM is located in the Sierra Nevada Mountains.  As anyone can expect from a typical mountain range, the terrain is steep and uneven.  However, the jagged terrain and the valley in the middle - which are both seen in the 3D image of the location - make this area atypical contrasted to stereotypical mountain images in movies, calendars, etc.  There is many data that can be pulled out from these images.  One side of the valley contains many mountain peaks that are higher than the peaks on the other side.  The valley in the middle is not very wide, and it seems to perfectly cut through the mountain range like a pair of scissors.  The higher mountain peaks are around the same elevation compared to each other; on the other side of the valley, the elevation is more uneven.  In the shaded relief model, one can also see a small valley cutting through the higher mountain peaks.  Overall, the area I chose was not anything too dramatic, but it had some very interesting features.

Extent Information
Top: 37.4113888882
Left: -118.955277779
Right: -117.780833334
Bottom: 36.7605555548

Information About The Geographic Coordinate System
Spatial Reference: GCS_North_American_1983
Linear Unit
Angular Unit: Degree (0.017453292519943295)
Datum: D_North_American_1983

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