Google Analytics, a free product that allows online publishers to gather statistics about visitors to their sites, was used on 81 of the top 100 sites.

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Mr. Calderon said violence in his country hadn't affected tourism and pointed to statistics showing the number of visitors to Mexico grew to 23 million in 2010, a 6% increase from a year earlier.

WSJ: Mexico Leader Lauds Nation's Safety at Tourism Conference

"The commission's publications, training materials and federal sentencing statistics are again readily accessible to visitors to the site, " it said in a statement.

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The statistics include returning Americans and repeat visitors.

CNN: U.S. tracks heaviest border-crossing points

Whether these maps will have sufficient caveats explaining why they may not show the real picture of local crime, and whether busy online visitors will have the time to really get to grips with statistics, remains to be seen.

BBC: Will crime maps work?

After the Games, Brazil could use the continued golf tourism boost the course could potentially bring, but if it is just another of the hundreds of worldwide Nicklaus courses, or ditto for Robert Trent Jones, Jr. and their brethren, the only way it could draw visitors if it turned out to be a spectacular, must-play courses, and based on experience and statistics that is highly, highly unlikely.

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