Mentioning courses taken on coursera.org in the statement of purpose Is it of any value to mention a course one is following on www.coursera.org, in a SOP?

For instance, if I have a Bachelor of Computer Science and want to apply for a Geoinformatics Master program, would it help my application at all to mention that I am currently following a Geoinformatics course on coursera.org to get familiar with the field?
I don't think it would necessarily hurt your application. However, if you have a limited number of words for your SOP, I think a better use of space would be to explain why exactly you want to obtain a degree in geoinformatics. Your Master's coursework will give you all the background (and probably more) that you need in the field, so it might be better to explain your motivation behind applying for the degree in the first place. Of course, if the Coursera course was a primary driver in your decision, that is highly relevant and should be mentioned.