Planet Four: Craters!
27 March 2015
We want you to help us count craters on the surface of Mars. This will help figure out how old various geological surfaces are! When marking craters on Mars using this new version of Planet Four, you will be using one of three different classification interfaces. The reason for the different interfaces is that we want to know which one works the best, the one that you enjoy using the most and find the easiest to use, and gives the best crater marking results.
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Ethical approval
This study has been approved by the University of Nottingham's Engineering department ethics committee
