Cosmographia is a visualization program rendering the solar system and its bodies in 3D to create a freely navigable map of the solar system. The program allows manipulation of time and camera (observer) position. It can use SPICE data to visualize trajectory, orientation, and sensors flown on and observations taken by interplanetary spacecraft, to support scientific or engineering analysis, and perhaps even public outreach.
The following links provide more information about Cosmographia, JSON, and SPICE.
The NAIF home page for the spice-enhanced Cosmographia is at http://naif.jpl.nasa.gov/naif/cosmographia.html
Information on SPICE data may be found at the NAIF website http://naif.jpl.nasa.gov/naif/aboutspice.html
Basic information on JSON may be found at http://www.json.org