Clickworkers logo Mars Clickworkers Your task:
Mark all craters
Show me how
This image is one of tens of thousands of images that we are asking volunteers to examine and identify craters in.

Instructions: Please click on four points around the rim of each crater. When finished, see below.

Be sure to scroll down and mark the whole image.

Image credit: NASA/JPL/MSSS.

Read about MOC images.

This image is lit from the lower right. Craters may look like they are convex.

If you're curious, you can see where and how this image was taken

Preload next image (What's this?)

Show the craters I’ve marked.

You can start clicking on the next crater — or the last one, if it’s wrong.

When you’re done:
Finished? I choose not to do this one.
I’ve marked some of the craters, but can’t finish.
I’ve marked every crater larger than this: tiny crater example
I don’t see any craters here (or none large enough to mark).
NASAAmes Research Center Clickworkers pilot study
Kanefsky/Barlow/Gulick
FAQ | Privacy | Contact us 		Powered by CL-HTTP