Cartograms are maps where generally the geographic which is being studied has its shape and its relative size distorted to reflect the magnitude of the variable which is currently being studied by the viewer. When looking at a cartogram the scaling is relative to the actual appearence of the country, but it is skewed to reflect the magnitude of the subject being illustrated. The difference in the scaling ultimately reflects the relative difference in attributes in certain areas. This cartogram shown is representing the 2004 presidential election results in the United States. You can see that the different colors of red and blue which were used reflects the differences in voter majority throughout the country. This is the main interest with cartograms, in that they are used to represent population differences as well as different trends.
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