Friday, April 23, 2010

Flow Map


Cartographers use flow maps to show the movement of objects from one location to another. These types of maps are easier to read due to merged edges and are uses frequently when depicting migrations. Flow maps can indicate things like what it is that flows, moves, migrates. What direction the flow is moving and what the source and destination is. Also it can show how much is flowing, being transferred, and transported. This map above is a map of Texas and shows the total combined truck flows in 1998. There is two different categories which are network flows and state to state flows. The map shows that most of the flow is through the eastern part of the United States even though there is a significant amount leaving Texas towards the western parts.

http://images.google.com/imgres?imgurl=http://www.lib.utexas.edu/maps/texas/combtrk_tx_1998.jpg&imgrefurl=http://www.lib.utexas.edu/maps/texas.html&usg=__lmhw0Vs7CBL3vJcLJjMnz-NcuNg=&h=524&w=723&sz=194&hl=en&start=4&um=1&itbs=1&tbnid=SlE37CWJGyVCEM:&tbnh=101&tbnw=140&prev=/images%3Fq%3DFlow%2Bmap%26um%3D1%26hl%3Den%26client%3Dsafari%26sa%3DN%26rls%3Den%26tbs%3Disch:1

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