The Guardian's collaboration with an online activist has resulted in a time lapse map visualizing Syrian casualties since March 2011, which is part of the Syrian Revolution Martyr Database. The database collects detailed information on 22,601 deaths and is used by the UN, while also being made available to users through a website that was launched in early May 2011. The project's founder has ensured data completeness and quality by merging multiple independent sources, and The Guardian has provided editorial support for this project.