VOZ began life as a project for the Environmental Network for Central America (ENCA). An online map was produced showing all Canadian owned gold mines in Central America, and the human and environmental abuses associated with each.

This map was useful in supporting articles by ENCA and bringing to light the extent of mining activities, but was limited by being difficult to update and having little connection with local populations.

This map is still available online at www.enca.org.uk/mining