The Data Access API (SoLDMDataAccess( C++ | Java | .NET ) ) provides methods to conveniently extract data from a volume managed by VolumeViz LDM. Data access can be used to extract data for computation, for segmentation or for display using other primitives. The data is accessible whether the SoVolumeData( C++ | Java | .NET ) node is part of a scene graph or not. The API allows an application to get the data associated with a specific tile at a specific resolution level. But more importantly it allows an application to ignore tiling and request the data values in a trace, a slice or an arbitrary subvolume. VolumeViz LDM takes care of copying data from all the required tiles to form the requested block of data.