Researchers at Graz University of Technology demonstrated using OpenGL ES to implement an Augmented Reality application for city geospatial asset management visualization on small handheld devices. The application overlays 3D data such as gas and power lines on top of a real city model captured by the built in camera. The goals is that a utility company field worker could point their mobile phone to a particular surface subsection of a road or building. Depending on the device’s position and orientation, the field worker would be shown a real-time visualization of the subsurface network of cables and pipes. The “x-ray vision” merges real world vision with computer graphics generated from GIS data stores. The prototype application was shown at the ISMAR 2006 conference running on three different Windows CE handhelds using software as well as hardware OpenGL ES.