Mars Clickworkers

Sample result

We try to have several people cover each region on Mars so that we can compute a consensus, throwing out any mistaken or frivilous entries and averaging out the inaccuracies. Here's an example of one region selected as a test case for intensive coverage:

Here are all the clicks we received for this region. (The red ones were rejected for non-circularity or size.)	Here is the consensus. Green circles have a high degree of agreement. Red circles have little agreement, and yellow ones are marginal.
It may be hard to see some of the fainter craters in the marked-up images. Here's the image with nothing in the way:

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