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Google Earth is a web and computer program that renders a 3D representation of Earth based primarily on satellite imagery.The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles.
Type 984 radar on HMS Victorious, 1961. 3D radar provides for radar ranging and direction in three dimensions. In addition to range, the more common two-dimensional radar provides only azimuth for direction, whereas the 3D radar also provides elevation.
This list of European countries by population comprises the 51 countries and 5 territories and dependencies in Europe, broadly defined, including Cyprus, Kazakhstan, Turkey, and the countries of the Caucasus.
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere.It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east.
This is a list of countries and territories in Europe by population density.Data are from the United Nations unless otherwise specified. [1] [2]Abkhazia, Georgia and South Ossetia are each bordered on the north by the Greater Caucasus, and may have some territory north of these mountains and thus in Europe by the most common definition.
The list below includes all entities falling even partially under any of the various common definitions of Europe, geographical or political.Fifty generally recognised sovereign states, Kosovo with limited, but substantial, international recognition, and four largely unrecognised de facto states with limited to no recognition have territory in Europe and/or membership in international European ...
Digital rendering of Europe focused over the continent's eastern portion. Eastern Europe is a subregion of the European continent.As a largely ambiguous term, it has a wide range of geopolitical, geographical, ethnic, cultural, and socio-economic connotations.
The dipole antenna of a radar altimeter of 1947. A radar altimeter (RA), also called a radio altimeter (RALT), electronic altimeter, reflection altimeter, or low-range radio altimeter (LRRA), measures altitude above the terrain presently beneath an aircraft or spacecraft by timing how long it takes a beam of radio waves to travel to ground, reflect, and return to the craft.