A cartogram is a map on which statistical information is shown in diagrammatic form. It uses some thematic variable which is substituted for land area or distance. The geometry of space of the map is distorted in order to convey the information of this alternate variable. This cartogram example show the HIV AIDs statistics; it bases the depicted area of the countries on how large their percentages are in relation to each other. The countries with the largest percentage of HIV among its people have the largest area and the countries with the smallest percentage are shown as smaller.
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