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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.
Google Maps is a web mapping platform and consumer application offered by Google. It offers satellite imagery, aerial photography, street maps, 360° interactive panoramic views of streets (Street View), real-time traffic conditions, and route planning for traveling by foot, car, bike, air (in beta) and public transportation.
The World Geodetic System (WGS) is a standard used in cartography, geodesy, and satellite navigation including GPS.The current version, WGS 84, defines an Earth-centered, Earth-fixed coordinate system and a geodetic datum, and also describes the associated Earth Gravitational Model (EGM) and World Magnetic Model (WMM).
Each of the 60 zones uses a transverse Mercator projection that can map a region of large north-south extent with low distortion. By using narrow zones of 6° of longitude (up to 668 km) in width, and reducing the scale factor along the central meridian to 0.9996 (a reduction of 1:2500), the amount of distortion is held below 1 part in 1,000 ...
Dymaxion map of the world with the 30 largest countries and territories by area This is a list of the world's countries and their dependencies , ranked by total area, including land and water. This list includes entries that are not limited to those in the ISO 3166-1 standard, which covers sovereign states and dependent territories .
A spatial reference system (SRS) or coordinate reference system (CRS) is a framework used to precisely measure locations on the surface of Earth as coordinates.It is thus the application of the abstract mathematics of coordinate systems and analytic geometry to geographic space.
[3] [a] In practice, the horizon can be defined as the plane tangent to a quiet, liquid surface, such as a pool of mercury. [4] The pole of the upper hemisphere is called the zenith. The pole of the lower hemisphere is called the nadir. [5] The following are two independent horizontal angular coordinates:
A satellite map of chlorophyll and phytoplankton concentration (top) paired with a map of oceanic surface temperatures at the same time (bottom). The thriving populations represented by green and yellow in the upper map correlate to areas of higher surface temperatures represented by yellow in the lower map (2 March 2009) .