Using images as links

[Kevin Goldstein]

I have a question about formatting on the wiki/community documentation.

How does one use an image as a link?

On the page https://help.ubuntu.com/community/UbuntuScientists
there are various icons denoting which repositories various packages are in.

I would like the icons to link to package information on 
http://packages.ubuntu.com.

I tried something like
[http://packages.ubuntu.com/edgy/science/gmt 
attachment:IconsPage/edubuntu.png] but it didn't show the image

There are instructions on the HelpOnLinking page but they don't seem to 
work. According to the instructions one should just use

[Link Image.png]

Compare https://wiki.ubuntu.com/HelpOnLinking and 
http://moinmoin.wikiwikiweb.de/HelpOnLinking.

On the ubuntu wiki the name moinmoin.png appears rather than the image 
itself. This might be because the image isn't on the ubuntu wiki.

thanks
Kevin