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Overlay (programming) In a general computing sense, overlaying means "the process of transferring a block of program code or other data into main memory, replacing what is already stored". [1] Overlaying is a programming method that allows programs to be larger than the computer's main memory. [2] An embedded system would normally use overlays ...
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.
A union overlay combines the geographic features and attribute tables of both inputs into a single new output. An intersect overlay defines the area where both inputs overlap and retains a set of attribute fields for each. A symmetric difference overlay defines an output area that includes the total area of both inputs except for the ...
Digital on-screen graphic. A digital on-screen graphic, digitally originated graphic ( DOG, bug, [1] network bug, or screenbug) is a watermark-like station logo that most television broadcasters overlay over a portion of the screen area of their programs to identify the channel. They are thus a form of permanent visual station identification ...
Dark web. (Redirected from Dark Web) The dark web is the World Wide Web content that exists on darknets: overlay networks that use the Internet but require specific software, configurations, or authorization to access.
Georeferencing or georegistration is a type of coordinate transformation that binds a digital raster image or vector database that represents a geographic space (usually a scanned map or aerial photograph) to a spatial reference system, thus locating the digital data in the real world. [1] [2] It is thus the geographic form of image registration.
A keyboard overlay is a plastic or paper masks that can be placed over the empty space between the keys, providing the user with the functional use of various keys. Alternatively, a user applies keyboard stickers with an extra imprinted language alphabet and adds another keyboard layout via language support options in the operating system. [25]
Darknet. A dark net or darknet is an overlay network within the Internet that can only be accessed with specific software, configurations, or authorization, [1] and often uses a unique customized communication protocol. Two typical darknet types are social networks [2] (usually used for file hosting with a peer-to-peer connection), [3] and ...