A Century of Growth is an interactive cartogram visualizing population increment inwards California inwards the i hundred years from 1900-2000. In fact the visualization includes vi dissimilar cartograms which present the population inwards each Californian county every 20 years from 1900 to 2000.
This Leaflet based cartogram shows the population increment inwards California past times changing the size of each county proportional to the county's population. If you lot alter the twelvemonth on the map the counties alter size to present the population inwards each county inwards the selected year. When you lot involve a twelvemonth on the map the map sidebar equally good updates to render a brief explanation of the population changes inwards California over the previous 20 years.
H5N1 Century of Growth equally good includes a practiced Definition of what a cartogram genuinely is. Jake has used a semi-contiguous cartogram inwards his visualization of California's growing population. The USGS Cartogram Types provides practiced definitions of contiguous, non-contiguous in addition to Dorling cartograms. This icon of the iii dissimilar types of cartogram visualizing the population of California is equally good a swell instance of the divergence betwixt contiguous in addition to non-contiguous cartograms.
In a non-contiguous cartogram the enumeration units (in this instance California's counties) create non convey to hold connectivity amongst each other. The counties tin grow or shrink inwards size in addition to continue their geographical shape. In a non-contiguous cartogram the units continue their connections. This leads to the bubbling number seen above, where the geographical cast of the counties teach distorted.
Jake has used a semi-contiguous cartogram. Because to a greater extent than or less large counties convey small-scale populations piece other geographically smaller counties convey much larger populations to a greater extent than or less of the connectivity betwixt the dissimilar counties is lost. The loss inwards geographical cast is mitigated past times including a small-scale geographically right inset map. The colors of the counties on the cartogram in addition to the inset map gibe to help the map user read the distorted cartogram. The user tin equally good hover over counties on the map to persuasion its name.
