It appears very similar to the tattoos done by Buddhist Monks in Thailand, which are done in many of the Budhist Monasteries.  An example would be Wat Bang Phra, which is two hours north of Bangkok.  It's believed to be an ancient Khmer script that hasn't been used for anything other than spiritual tattoos for approximately 800 years.  I understand that actress Angelina Jolie has something similar to the image you forwarded to me.

For the Monks who perform the tattoos, and for the Thais who normally recieve them, the tattoo would have tremendous spiritual significance.  Such tattoos are thought to be powerful amulets to protect a person from harm.