How to Mislead With Charts: Stand Your Ground Laws and Gun Deaths in Florida
As data journalism has its moment in the media, a reminder that we bring our own assumptions to the reading of charts and graphs.
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The Human Influence Index Graphics
The Human Influence Index, from the Last of the Wild data set, is a measure of direct human influence on terrestrial ecosystems using the best available data sets on human settlement (population density, built-up areas), access (roads, railroads, navigable rivers, coastline), landscape transformation (land use/land cover) and electric power infrastructure (nighttime lights). Its values range from zero to 64, with zero representing no human influence and 64 representing maximum human influence.
Last of the Wild Graphics
The Last of the Wild graphics, from the Last of the Wild data set, represent the least influenced (most wild) areas of major terrestrial biomes. Most wild in each biome are defined as areas with Human Footprint Index values less than or equal to 10. The maps below show the distribution of what remains the least influenced areas in each biome.
The Human Footprint Index Graphics
The Human Footprint Index, from the Last of the Wild data set, expresses as a percentage the relative human influence in each terrestrial biome. Its values range from zero to 100, with a value of zero representing the least influenced, or 'most wild,' and a value of 100 representing the most influenced, or 'least wild,' part of the biome.