Cartogram


GIS Learning

Geography of Billionaires: Mapping Nationalities and Residency

Geography of Billionaires: Mapping Nationalities and Residency

Forbes recently released an updated list of the world’s billionaires.  The listing contains the ranking for 1,226 individuals and families who’s net worth as of March of 2012 was 1 billion USD or more.  Since the listings contained both a country of citizenship and residence, this allows for a peek […]

Maps and Cartography

Noncontiguous cartogram showing population density within Europe. (Source: Vinny Burgoo). Projection: Lambert Azimuthal Equal Area. Data: January 2008 population data from Eurostat.Noncontiguous cartogram showing population density within Europe. (Source: Vinny Burgoo). Projection: Lambert Azimuthal Equal Area. Data: January 2008 population data from Eurostat.

Area Cartogram Maps Explored

Area cartogram maps are maps of non-absolute space where the areal extent is in proportion to some measured value.  Cartogram maps retain a partially accurate relative location and relative space, but the actual area of the individual polygons features are overrepresented or underrepresented based on the assigned values. Area cartograms […]

Maps and Cartography

First Thematic Maps

First Thematic Maps

Zachary Forest Johnson provides an overview on Indiemaps.com on the first published instances of each of the six most commonly used thematic mapping techniques: choropleth, proportional symbol, dot density, flow, isarithmic, and cartogram.  Each technique’s first mapping instance is described along with a scanned sample of the map.  In conclusion, […]