The Ijen Volcanic Complex is a group of stratovolcanoes on East Java, Indonesia. The main caldera in which the volcanoes sit is 20 kilometers wide. The lake in the center of the caldera is recognized as the largest highly acidic lake in the world with a pH of 0.5 due to the presence of sulfuric acid. This model has a VE of 3 due to the large surface area. High Elevation: 3200m Low Elevation: 0m Area: 2,116 km2This model was generated using a program that is currently being developed. It is based on the GMRT dataset (http://www.marine-geo.org/portals/gmrt/) and utilized the interface from GeoMapApp (http://www.geomapapp.org)