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The Linux version began with the version 4 beta of Google Earth, as a native port using the Qt toolkit. The Free Software Foundation considers the development of a free compatible client for Google Earth to be a High Priority Free Software Project. [60] Google Earth was released for Android on February 22, 2010, [61] and on iOS on October 27, 2008.
Google Maps - covers the whole country; Libre Map Project; MapQuest - covers the whole country; The National Map by the United States Geological Survey. Roadtrippers - covers the whole country; TerraServer-USA - covers the whole country; Uzbekistan. 2GIS, by 2GIS. Vietnam "Vietbando Maps", by Vietbando. "Vinalo Maps", Vinalo. See also
Topographic maps are also commonly called contour maps or topo maps. In the United States, where the primary national series is organized by a strict 7.5-minute grid, they are often called or quads or quadrangles. Topographic maps conventionally show topography, or land contours, by means of contour lines.
USGS Maps. Every USGS topographic map available for free download from the Internet Archive. OpenStreetMap - CC-BY-SA 2.0 vector map data collected by GPS; The Map Library - Maps for Central America and Africa. Tag with commons:Template:PD-MapLibrary (talk, backlinks, edit) GinkgoMaps - Free Digital Maps published under the CC-by Licence
Vector overlay is an operation (or class of operations) in a geographic information system (GIS) for integrating two or more vector spatial data sets. Terms such as polygon overlay, map overlay, and topological overlay are often used synonymously, although they are not identical in the range of operations they include.
3D rendering of a DTM of Tithonium Chasma on Mars. A digital elevation model (DEM) or digital surface model (DSM) is a 3D computer graphics representation of elevation data to represent terrain or overlaying objects, commonly of a planet, moon, or asteroid.
Keyhole Markup Language (KML) is an XML notation for expressing geographic annotation and visualization within two-dimensional maps and three-dimensional Earth browsers. KML was developed for use with Google Earth, which was originally named Keyhole Earth Viewer. It was created by Keyhole, Inc, which was acquired by Google in 2004.
The maps are produced by the USGS, which encourages the distribution of their maps through business partners. TopoZone offered aerial photographs from the USGS and street maps from the United States Census Bureau. In 2007 complete coverage of Canada was added, using the topographic map series produced by Natural Resources Canada.
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