{"id":4694,"date":"2016-01-11T09:00:30","date_gmt":"2016-01-11T09:00:30","guid":{"rendered":"http:\/\/www.viewsoftheworld.net\/?p=4694"},"modified":"2016-02-10T21:34:07","modified_gmt":"2016-02-10T21:34:07","slug":"the-anthropocene","status":"publish","type":"post","link":"https:\/\/www.viewsoftheworld.net\/?p=4694","title":{"rendered":"Mapping the Anthropocene"},"content":{"rendered":"

The effects of humans on the global environment are perceived to be so significant by some scientists that they argue<\/a> the onset of industrialisation (in the eighteenth century) has been a major driving force in environmental change on a par with the forces of nature. It is this rapid impact that has led some geologists to unofficially name (but not, as yet, officially recognise<\/a>) this recent period of the earth\u2019s history (from around 1760-onwards) as the Anthropocene<\/em> (roughly translating as the era \u2013 or epoch \u2013 shaped considerably through the actions of humanity).<\/p>\n

\"The<\/a>
\nGridded population cartogram displaying the topography of the world in relation to the population distribution<\/em><\/font> (click here for larger version)<\/a><\/p>\n

Geographers have helped analyse, and increase our understanding of, the complex relationship between the physical and human environment, regularly using maps and visualisations to help shape our view of the world. Graphical displays have a long history in translating the complexity of our environment into understandable visual representation, with maps the most common way of representing the geography of our world, showing us how to get from A to B, and much more besides.
\nAlthough the traditional concept of a map is currently being challenged and revised in digital formats (for example, through the in car Sat-Nav) these still rely upon the underlying and traditional techniques of mapping, invented to discover unknown places and explore our physical environment, and do not have the capabilities needed to help us better understand the complex human-environment relationships of the Anthropocene.
\nGeographers\u2019 response to this problem has been to identify a need for new maps, developing new ways of mapping that use the computing powers of geographical information systems (GIS) to allow any geographic information from the human and physical environment of the world – issues as diverse as wealth, rainfall, or even the environmental conditions of the oceans \u2013 and how these are distributed across the world, to be illustrated in a visually interesting way.
\nThe technique used to create these maps, known as a \u2018gridded cartogram\u2019 projection<\/a>, works by morphing the recognisable shape of the world map so that the \u2018area\u2019 of the map represents not that of the actual land area but instead reflects the quantity of the dataset being presented. The technique applies something known as a \u2018density-equalising algorithm<\/a>\u2019 to an underlying grid, ensuring the preservation of an accurate geographic reference to the real world.
\nOne example, providing a clear demonstration of the capabilities of this technique, combines data on the world\u2019s population against the altitudes at which they live (a \u2018topographic\u2019 layer). The map created uses an \u2018equal-population\u2019 projection where every person on the planet gets the same amount of map-space. This allows an understanding of the distribution of people in relation to the elevations at which they live. The visual effect on the world map is dramatic: with very low population densities in mountainous areas such as the Himalayas in Asia, the Rocky Mountains in North America or the Andes in South America, many of the world\u2019s highest areas virtually disappear from the map. At the same time, the map highlights the high plateau of Mexico City and densely populated Ethiopian highlands as regions where high altitude has not restricted population.
\nThis simple example just hints at how visualising geographical data in an interesting, and sometimes unusual, way can help to make the complexity of the world more understandable and the data more meaningful. An example demonstrating human impact on the world using this technique comes in a series of three maps showing \u2018ecological footprint\u2019 data. The \u2018ecological footprint\u2019 is a measure for the amount of resources being used \u2013 in total and per head of population \u2013 as a measure of the sustainability of a country\u2019s economy.<\/p>\n

\"Ecological<\/a>
\nThe ecological footprint describes the number of planets that were needed for a sustainable future if all people on the planet were using the same resources. It is expressed as x-planet living for a country. A: Shown on a conventional map, B: Shown on a gridded population cartogram, C: Shown as a gridded cartogram where each grid cell is resized according to its total ecological footprint<\/em><\/font> (click here for larger version)<\/a><\/p>\n

The first, a \u2018normal\u2019 world map, displays the ecological footprint categorisation (from sustainable to very unsustainable following a traffic light scheme from green to red) in the way it is most usually presented, with darker colours representing the bigger \u2018footprint\u2019 (and environmental impact) from more industrialised nations. The second map, a gridded \u2018population cartogram\u2019, works in the same way as altitude in the previous example. Displaying the same \u2018ecological footprint\u2019 data against country population data, it shows that relatively few people globally are living very unsustainable lifestyles. The third map shows the real extent of their impact, goes further still with the \u2018gridded cartogram\u2019 calculating the total hectares of ecological footprint that the people in each grid cell have (reflecting where most people live within a country, assuming people have a similar footprint within and across each country). This map therefore is a clear visual demonstration the high resource use, and unsustainable lifestyles, of relatively few people globally.
\nThe use of cartograms like these will not solve all the challenges humanity faces, but a map can speak a thousand words and have a much bigger impact on people than a thousand complex charts and tables do. The world in the Anthropocene may be a complex one, but it is one that geographers are finding ever better ways to explain.<\/p>\n

The maps shown on this page were taken from the following publication:
\nHennig, Benjamin D (2013). Rediscovering the World: Map Transformations of Human and Physical Space. Heidelberg \/ New York \/ Dordrecht \/ London (Springer).
\ndoi: 10.1007\/978-3-642-34848-8<\/a><\/p>\n

This article was a contribution to Geography Today<\/a> by the Royal Geographical Society (also available as a PDF<\/a>). A modified version of this map was also featured in How to land a jumbo jet<\/a> published by Lonely Planet<\/a>. All content has been created by Benjamin Hennig. Please contact me<\/a> for further details on the terms of use.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

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