Maps encoded with data arre a useful tool for visual information seeking tasks. For the visually impaired, visual maps are difficult or impossible to use. This project seeks to create maps that use auditory data encoding for use by the visually impaired. The project was initiated by Haixia Zhao, Ben Shneiderman, and Catherine Plaisant of the HCIL. The LAP is now assisting the HCIL with usability testing of the interface.

For example, high data values can be represented by high-pitched notes. Locations in space are indicated by stereo or 3-dimensional sounds. Different types of information can be encoded using different timbres. Users navigate from one state to another using the arrow keys and page navigation keys of a standard keyboard. This interface allows users to "sweep" across the map to get the gist of data patterns in a map, and to get specific information about a specific state. The pilot test indicated that with some training, users found this interface easier to use than a simple table.