article_snippet.sent: The interactive map was created by writer Levi Pearson, who used a UFO sighting dataset from the National UFO Reporting Centre and open source software from CartoDB.
article_snippet.sent: It was created by writer Levi Pearson, who used a UFO sighting dataset from the National UFO Reporting Centre and open source software from CartoDB .
article_snippet.sent: The UFO map (pictured) was created by writer Levi Pearson, who used a UFO sighting dataset from the National UFO Reporting Centre and open source software from CartoDB.