Visualizing global virtual land flow using halfcircle diagram

Authors: Sohyun Park*, Ohio State University, Darla Munroe, Ohio State University
Topics: Applied Geography, Environmental Science, Land Use
Keywords: Visualization, Agricultural trade, Virtual land use, Halfcircle
Session Type: Paper
Day: 4/7/2019
Start / End Time: 2:00 PM / 3:40 PM
Room: Cleveland 2, Marriott, Mezzanine Level
Presentation File: No File Uploaded


As land resources become scarcer in some countries and international trade to compensate the scarcity becomes complex, it is crucial to understand the connected human-environmental systems and the impacts of potential drivers of the virtual land flow. This research aims to examine and compare the impacts of economic level and land endowment of countries upon virtual land flow embedded in trade of four different agricultural commodities. We use a newly developed R package called ‘halfcircle’ to visualizing global virtual land flow associated with food trade between 154 countries during the period of 1986-2013. To create a halfcircle diagram, countries are projected as points on a center line of a circle according to the order of GDP per capita and land endowment, respectively, and flows are represented as half-circles drawn from the origin to the destination in a clockwise direction. Using the halfcircle diagram and plotting time-series changes of the weighted mean center of halfcircles, we demonstrate that the impacts of GDP per capita and land endowment on global virtual land flow are variated by types of crops.

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