Geographers at the University of Cincinnati have created a map to demonstrate just how much the planet has changed over…
Geographers at the University of Cincinnati have created a map to demonstrate just how much the planet has changed over 25 years. The result is a glorious (and slightly trippy) swirl of color.
Unfortunately, the practical implications of these patterns are not quite as pretty as the design itself. Dit is omdat het het feit dat zo veel als 22 procent van de aarde’s habitable oppervlakte is veranderd aanzienlijk in de jaren tussen 1992 en 2015, of het te wijten is aan deforestatie, waterverlies, of stedelijk verspreiding.
“It’s very informative. There is nothing else like it, “said Tomasz Stepinski, a UC professor who worked on the project now published in the International Journal of Applied Earth Observation and Geoinformation.
” There are maps of forest loss but no maps showing everything. “
To create the map, Stepinski and co. used high-resolution satellite images captured by the European Space Agency to study climate change, a process the organization began back in 1
992. Specifically, the team used two images – one from 1992 and one from 2015.
The images are so detailed , the researchers were able to divide them into 300-square-meter (3,200-square-foot) grids (pixels). For each of these pixels, the team used 22 land-use categories (types of forest, farmland, wetlands, grasslands, and urban development) to measure how the environment changed in the space of a quarter of a century.
But there was a problem. Resultatet var en kort så detaljeret at det var praktisk talt umuligt at analysere på et globalt plan. It looked like a “bowl of fruity pebbles,” according to a statement on the research.
Instead, the team extended the size of the pixels to 9 kilometers (5.6 miles) and reduced the number of land-use categories to 9. They then used three shades of color to display the extent of the change. Dette betyr at det nå er mulig å se brede trender i landbruk, men forskere kan fortsatt innhente og studere endringer på en 300-kvadratmeter skala.
White indicates little or no change. Darker shades indicate the highest rate of change in each category. Graphic / Tomasz Stepinski / UC