What are area cartograms?
Area cartogram maps are maps of non-absolute space where the areal extent is in proportion to some measured value. Area cartograms are useful for visualizing relativity based on a common quantitative attribute such as population.
What are population cartograms?
If we want to show where the world’s people are we need a population cartogram, a geographical presentation of the world where the size of the countries are not drawn according to the distribution of land, but according to the distribution of people.
What is a cartogram used for?
Cartograms are used for thematic mapping. They are a particular class of map type where some aspect of the geometry of the map is modified to accommodate the problem caused by perceptually different geographies.
What do you mean by Cartograms?
A cartogram (also called a value-area map or an anamorphic map, the latter common among German-speakers) is a thematic map of a set of features (countries, provinces, etc.), in which their geographic size is altered to be directly proportional to a selected ratio-level variable, such as travel time, population, or GNP.
What do you mean by cartogram?
A cartogram is a map in which the geometry of regions is distorted in order to convey the information of an alternate variable. Most of the time, a cartogram is also a choropleth map where regions are colored according to a numeric variable (not necessarily the one use to build the cartogram).
How are countries displayed on a cartogram?
In this cartogram the size of a country is built using square grids, each representing 1 million people – the larger the total population, the larger the country. In this form, cartograms are used to display the relative time and distance within a chosen network.
What does cartogram mean?
Definition of cartogram : a map showing geographically diagrammatic statistics of various kinds usually by the use of shades, curves, or dots.
What are the three types of cartograms?
There are three main types of cartograms, each have a very different way of showing attributes of geographic objects- Non-contiguous, Contiguous and Dorling cartograms.
When should I use a cartogram?
1Represent a population through area cartograms Use a cartogram when you need to represent an area in the context of the value a variable associated with it holds, making it useful as an isodemographic map.