Cartogram


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cartogram

[′kärd·ə‚gram]
(mapping)
A type of single-factor or topical map that is often diagrammatic to show traffic flow, movement of people or goods, or value by area, where areas of the political subdivisions are distorted so that their size is proportional to their monetary value.

Cartogram

 

a map that shows the average intensity of a phenomenon for individual regions (units) of the territorial division shown on the map.

For example, a cartogram may characterize the average population density or the extent of plowed land (average hectares of arable land per hundred hectares of total land area) according to country, region, or district. To make the map easier to read, each territorial unit is colored or hachured according to the computed intensity of the phenomenon in it, so that the density of the coloring or hachures reflects this intensity.

Cartograms are especially widely used for graphic reproduction of statistical data on population and agriculture. A shortcoming of cartograms is that they do not show differences in the intensity of the phenomena within each territorial unit; this problem is lessened by a further territorial division.

References in periodicals archive ?
Caption: Figure 4 Example of a Dorling cartogram. Protovis.
About Cartogram is a Seattle-based startup specializing in linking businesses with their customers and employees through an easy-to-use, fully customizable indoor maps application.
On the cartogram of a late neonatal mortality are represented regions (Figure 1c):
Speckmann, On rectangular cartograms, Computational Geometry: Theory and Applications, 37 (2007), 175-187.
But these 'cartograms' should leave nobody in any doubt that, despite hundreds of millions going into infrastructure like Curzon Street and the Midland Metro, it is not scratching the surface.
To create the cartogram of agro ecological evaluation based on digital terrain model (DTM) there were multitopic grids by methods of spatial interpolation (extrapolation).
In a cartogram (bottom left), a nation's size expands if its warming contribution is large for its geographic area and contracts if emissions are low per unit area.
Our cartogram, which is arranged by region, shows states that are currently expected to vote for the Republican presidential nominee (red), and those that are expected to go for President Obama, a Democrat (blue).
Charts: bar chart, line chart, point chart, radar chart, cartogram
Examples are endless and growing with technology: block diagram; calendar; cartogram; concept map; consequence or flow chart; cross-section; diagram with labels (picture glossary); flow map (with journey lines); graphs (bar, column, line, pie); iconic texts, such as signs; map sequences; maps with journey lines; nested diagram; numbered diagram; scale diagram; sequence map; signs and symbols; site map (tree diagram); sociogram; spectrum diagram; story map (a kind of flow map); tally sheet; timeline (simple, multiple, cyclical).
The new map created uses a gridded population cartogram, with each grid cell sized according to the number of people who live there.