Some KML information cannot be viewed in Google Maps or Mobile. KML shares some of the same structural grammar as Geography Markup Language|GML. Other data can make the view more specific, such as tilt, heading, altitude, which together define a "camera view". Each place always has a longitude and a latitude. The KML file specifies a set of features (placemarks, images, polygons, 3D models, textual descriptions, etc.) for display in Google Earth, Maps and Mobile. The term "Keyhole" actually honors the KH-11|KH reconnaissance satellites, the original eye-in-the-sky military reconnaissance system now some 30 years old.) (The word Keyhole is an earlier name for the software that became Google Earth the software was produced in turn by Keyhole, Inc, which was acquired by Google in 2004. KML ( Keyhole Markup Language) is an XML-based Markup language for managing the display of three-dimensional geospatial data in the programs Google Earth, Google Maps, Google Mobile, ArcGIS Explorer and World Wind. (most content here is directly quoted from the KML wikipedia article)
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