<P> A cartogram is a map in which some thematic mapping variable -- such as travel time , population , or GNP -- is substituted for land area or distance . The geometry or space of the map is distorted , sometimes extremely , in order to convey the information of this alternate variable . They are primarily used to display emphasis and for analysis as nomographs . </P>
<P> A cartogram is a map in which some thematic mapping variable -- such as travel time , population , or GNP -- is substituted for land area or distance . The geometry or space of the map is distorted , sometimes extremely , in order to convey the information of this alternate variable . They are primarily used to display emphasis and for analysis as nomographs . </P>
what types of data are best measured by a cartogram map
what types of data are best measured by a cartogram map
travel time population GNP
travel time population GNP