30 m (1 arcsecond; USGS NED) Global: 90 m (3 arcseconds; SRTM) Oceans: 2 arcminutes and better Age Some USGS aerial images were taken in the early 1990s. Landsat 7 images are all taken after 1999 (except for Geocover 1990). See also Bhuvan Bing Maps Géoportail GeoServer Geoweb Google Earth Google Maps List of observatory software Marble (software) Microsoft Research Maps Planetarium software Space flight simulation game List of space flight simulation games Web mapping References External links NASA Web WorldWind NASA WorldWind Java https://worldwind.arc.nasa.gov/android/get-started/ https://github.com/NASAWorldWind/WorldWindAndroid https://jitpack.io/p/NASAWorldWind/WorldWindAndroid https://github.com/WorldWindEarth/WorldWindJava/blob/develop/README.md https://github.com/WorldWindEarth/WorldWindJava/wiki WorldWind Android "Community Edition" SDK NASA WorldWind.NET (legacy) at SourceForge worldwind.earth, personal projects of Bruce Schubert, a software engineer on the NASA WorldWind team 2004 software Earth sciences graphics software Free software programmed in Java (programming language) Graphic software in meteorology Keyhole Markup Language Internet software for Linux Linux programming tools MacOS programming tools NASA online Planetarium software for Linux Programming tools for Windows Satellite imagery Science education software Virtual globes