Clickworkers training: Crater Marking

Mars Clickworkers

Your task:
Mark all craters
(training -- click here to do a real one)

This image is one of tens of thousands of images that we are asking volunteers to examine and identify craters in.

Instructions will appear here when page is finished loading.

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Here’s an Undo button ———>

Your task, should you choose to accept it: Click on four points around the rim of each crater. You may ignore craters that are smaller than this:

When you are finished, click here to be assigned a real task.

NASA

Ames Research Center

Clickworkers pilot study
Kanefsky/Barlow/Gulick
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