Johnathan Choi ’15


Ecology and Evolutionary Biology

Project Title

Using Amazon’s Mechanical Turk and the Internet to Map Africa’s Farmland

This summer I was fortunate to work in Dr. Kelly Caylor’s lab at Princeton University under Dr. Lyndon Estes. My internship revolved around a project utilizing’s Mechanical Turk service to map cropland in South Africa. Much of my internship was spent investigating the mechanics of Google Maps and Amazon’s Mechanical Turk, and creating preliminary support infrastructure for future stages of our project. I looked at the quality control methods that could be employed for the project, specifically examining data using the open-source programming language, R. I learned a lot about geospatial data analysis, the manipulation of data files in R, and about the research process in general. This internship has solidified my commitment to work in the field of environmental science and sustainable development in the future.

Internship Year


Project Category



Princeton University, Princeton, New Jersey


Lyndon Estes, Associate Research Scholar, Woodrow Wilson School and the Program in Science, Technology, and Environmental Policy; Lecturer, Ecology and Evolutionary Biology; Kelly Caylor, Assistant Professor, Civil and Environmental Engineering