by two members of the free software community who had made contributions to WorldWind. Punt was based on the code in WorldWind 1.3.2, but its initial release has features not found in WorldWind 1.3.2 or 1.3.3 (such as support for multiple languages). Currently, Punt is only available for Windows, but long-term goals include a desire to move to a cross-platform solution. Datasets available Low resolution Blue Marble datasets are included with the initial download; as a user zooms into certain areas, additional high resolution data is downloaded from the NASA servers. The size of all currently available data sets is about 4.6 terabytes. Earth Animated data layers Scientific Visualization Studio MODIS GLOBE NRL Real-Time Weather Image/terrain datasets Blue Marble Next Generation imagery Landsat 7 imagery NLT Landsat (Visible & Pseudo Color) Geocover 1990 & 2000 (pseudo; 1990 layer was produced from Landsat 4 & 5 images) OnEarth (visible & pseudo) i-cubed (visible) USGS imagery Digital Ortho (DOQ - scanned black and white aerial image)s Urban Area Ortho (montaged color aerial photography of many major US metropolitan areas) Topographic maps Zoomit! imagery (community produced layer) LINZ (montaged color aerial photography of New Zealand) GSWA (Topographic and geological maps of Western Australia) South Africa (colour satellite and aerial imagery) US imagery (montaged color aerial photography of many major US metropolitan areas) SRTM (SRTM30Plus/SRTMv2/USGS NED) terrain data (includes bathymetry) Extraterrestrial datasets Moon Clementine (40xx - Colour, 30xx - Greyscale) Hypsometric Map Mars MOC (Mars Global Surveyor – Mars Orbiter Camera) MOLA (MGS – Mars Orbiter Laser Altimeter hypsometric map) THEMIS (Mars Odyssey – Thermal Emission Imaging System) MDIM (Viking – Mars Digital Image Model) Venus Magellan Imaging Radar (color and grayscale) Hypsometric Map Jupiter Jupiter Callisto Europa Ganymede Io Sloan Digital Sky Survey Survey Imagery SDSS Server WMAP Image Server Footprint Imagery SDSS Footprint FIRST (Faint Images of the Radio Sky at Twenty-cm) Footprint Specifications Baseline resolutions 500 m (Blue Marble Next Generation) 15 m (Landsat imagery; except for polar areas) Typical high resolutions U.S. USGS Digital Ortho: 1 m (grayscale; near full coverage) USGS Urban Area Ortho: 0.25 m Zoomit!: 0.15 m to 1 m New Zealand Zoomit! (from LINZ data): 2.5 m (color and grayscale) Western Australia Zoomit! (from GSWA): 250K surface geology mosaic, 250K topographic data, Magnetic Intensity, Bouger Gravity South Africa Zoomit!: Spot5 10 m (colour near full coverage), Robben Island 0.5 m, Johannesburg 2.5 m Altitude resolution U.S.: