Monday, November 15, 2010

Lab 6: Digital Elevation Models in GIS

DEM

The Digital Elevation Model Area I selected was the San Francisco Bay Area.  I chose the SF Bay Area for two reasons: first, it is where I’m from so I wanted to see it from a different perspective, and second, I thought it would be a more visually interesting map to see the landmass surrounded by water.  The model shows that the Bay Area is made of elevated land littered with hills all around the water.  At the same time some areas are below sea level as evidenced by this map and indicates remarkable engineering to keep the water level back from these areas.  The geographic coordinate system used to build this model is the North American 1983 datum.  The extent of the area from north to south is 38.1022 to 37.5158 decimal degrees.  The extent of the area is west to east is -122.5416 to -122.1205 decimal degrees.  







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