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Learn about the Control key (Ctrl), a modifier key used in computing to perform special operations with other keys. Find out how it evolved from teletypewriters and terminals, where it is located on different keyboards, and how it is notated in various programs and systems.
A table that compares various features and functions of different web map services, including Google Maps, Bing Maps, MapQuest, Mapy.cz, OpenStreetMap, Here WeGo, Apple Maps and Yandex Maps. See the availability, navigation, directory, interface and viewing interface of each service.
Google Maps offers satellite imagery, street maps, 360° views, traffic conditions, and route planning for various modes of transportation. It was launched in 2005 by Google, after acquiring several companies that developed the technology and data behind it.
A Smith chart is a graphical tool for solving problems with transmission lines and matching circuits in radio frequency engineering. It shows impedances, admittances, reflection coefficients, scattering parameters and other parameters on a complex plane with a wavelength and degree scale.
Learn about the history, features and uses of the Mercator projection, a conformal cylindrical map projection presented by Gerardus Mercator in 1569. The Mercator projection is widely used for navigation, web maps and atlases, but it distorts the size and shape of landmasses near the poles.
Web Mercator is a variant of the Mercator map projection used for Web mapping applications. It uses spherical formulas with WGS 84 ellipsoidal coordinates, resulting in a slightly non-conformal projection that distorts angles and areas.
A conformal map is a function that locally preserves angles, but not necessarily lengths. Learn about the different types of conformal maps in two and three dimensions, and their applications in geometry, physics, engineering and cartography.
Learn about the concept of rotation in geometry and algebra, and how it can be represented in different dimensions and formalisms. Find out the definitions, properties, and examples of rotations, as well as their applications in physics and mechanics.