Friday, October 14, 2011

Topography Map

http://www.nationalatlas.gov/

This is a topographic map because it shows elevation on the land. This qualifies this map as being 3-D. Surface elevation is depicted through varying color range and by shadows. Since this is a satellite image, the topography is very accurately mapped, as accurate as a picture. Rivers in the surrounding states are identified by a blue labeled line, so are the surrounding states. The surrounding states are a yellow color, without the 3-D elevation feature. This omission of elevation in these states enhances the contrast between Oregon, which is the country and land area the map was trying to depict, hence the emphasis.

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