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TopoJSON
GeoJSON is an open standard format designed for representing simple geographical features, along with their non-spatial attributes. It is based on the JSON format. The features include points (therefore addresses and locations), line strings (therefore streets, highways and boundaries), polygons (countries, provinces, tracts of land), and multi-part collections of these types. GeoJSON features are not limited to representing entities of the physical world only; mobile routing and navigation apps, for example, might describe their service coverage using GeoJSON. The GeoJSON format differs from other geographic information system standards in that it was written and is maintained not by a formal standards organization, but by an Internet working group of developers. A notable offspring of GeoJSON is TopoJSON, an extension of GeoJSON that encodes geospatial topology and that typically provides smaller file sizes. History The GeoJSON format working group and discussion were be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GIS File Format
A GIS file format or geospatial file format is a standard for encoding geographical information into a computer file. It is a specialized type of file format for use in geographic information systems (GIS), remote sensing image processing tools, and other geospatial applications. Since the 1970s, dozens of formats have been created based on various data models for various purposes. They have been created by government mapping agencies (such as the USGS or National Geospatial-Intelligence Agency), GIS software vendors, standards bodies such as the Open Geospatial Consortium, informal user communities, and even individual developers. History The first GIS installations of the 1960s, such as the Canada Geographic Information System were based on bespoke software and stored data in bespoke file structures designed for the needs of the particular project. As more of these appeared, they could be compared to find best practices and common structures. When general-purpose GIS software w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SFA LineString
SFA may refer to: In science and technology In medicine * Superficial femoral artery, a large artery in the thigh In chemistry * Saturated fatty acid, a type of fatty acid with no double bonds * Segmented flow analysis, a technique and class of instrument used in chemical analysis * Sodium fluoroacetate, an organofluorine chemical compound, and the sodium salt of fluoroacetic acid In physical science and engineering * Substance flow analysis, a method of analyzing the flows of a material in a well-defined system * Surface forces apparatus, a scientific instrument and technique * Svenska Flygmotor Aktiebolaget late 1940s Swedish aero-engine manufacturer Other uses in science and technology * Sales force automation, information systems used in customer relationship marketing * Simple feature access, a standard storage and access model for geographical data * Single Frequency Approach, an aviation procedure * Stochastic Frontier Analysis, a method of economic modeling * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JavaScript Library
A JavaScript library is a library of pre-written JavaScript code that allows for easier development of JavaScript-based applications, especially for AJAX and other web-centric technologies. They can be included in a website by embedding it directly in the HTML via a script tag. Libraries With the expanded demands for JavaScript, an easier means for programmers to develop such dynamic interfaces was needed. Thus, JavaScript libraries and JavaScript widget libraries were developed, allowing for developers to concentrate more upon more distinctive applications of Ajax. This has led to other companies and groups, such as Microsoft and Yahoo! developing their own JavaScript-based user interface libraries, which find their way into the web applications developed by these companies. Some JavaScript libraries allow for easier integration of JavaScript with other web development technologies, such as CSS, PHP, Ruby, and Java, while others provide utilities, often in the form of JavaScript ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Client Side
Client(s) or The Client may refer to: * Client (business) * Client (computing), hardware or software that accesses a remote service on another computer * Customer or client, a recipient of goods or services in return for monetary or other valuable considerations * Client (ancient Rome), an individual protected and sponsored by a patron * Client (band), a British synthpop band ** ''Client'' (album), a 2003 album by Client * ''Clients'' (album), a 2005 album by The Red Chord * ''The Client'' (novel), a 1993 legal thriller by John Grisham ** ''The Client'' (1994 film), a film adaptation ** ''The Client'' (TV series), a 1995–1996 television series adaptation * The Client (''Star Wars''), a character in ''The Mandalorian'' * ''The Client'' (2011 film), a South Korean courtroom thriller * "The Client" (''The Office''), an episode of ''The Office'' See also * Client (prostitution) * Client state A client state in the context of international relations is a State (polity), st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cartogram
A cartogram (also called a value-area map or an anamorphic map, the latter common among German-speakers) is a thematic map of a set of features (countries, provinces, etc.), in which their geographic size is altered to be Proportionality (mathematics), directly proportional to a selected variable, such as travel time, population, or gross national income. Geographic space itself is thus warped, sometimes extremely, in order to visualize the distribution of the variable. It is one of the most abstract types of map; in fact, some forms may more properly be called diagrams. They are primarily used to display emphasis and for analysis as Nomography, nomographs. Cartograms leverage the fact that size is the most intuitive visual variable for representing a total amount.Jacque Bertin, ''Sémiologie Graphique. Les diagrammes, les réseaux, les cartes''. With Marc Barbut [et al.]. Paris : Gauthier-Villars. ''Semiology of Graphics'', English Edition, Translation by William J. Berg, Univ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geospatial Topology
Geospatial topology is the study and application of qualitative spatial relationships between geographic features, or between representations of such features in geographic information, such as in geographic information systems (GIS). For example, the fact that two regions ''overlap'' or that one ''contains'' the other are examples of topological relationships. It is thus the application of the mathematics of topology to GIS, and is distinct from, but complementary to the many aspects of geographic information that are based on quantitative spatial measurements through coordinate geometry. Topology appears in many aspects of geographic information science and GIS practice, including the discovery of inherent relationships through spatial query, vector overlay and map algebra; the enforcement of expected relationships as validation rules stored in geospatial data; and the use of stored topological relationships in applications such as network analysis. Spatial topology is the g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newline Delimited JSON
JSON streaming comprises communications protocols to delimit JSON objects built upon lower-level stream-oriented protocols (such as TCP), that ensures individual JSON objects are recognized, when the server and clients use the same one (e.g. implicitly coded in). This is necessary as JSON is a non-concatenative protocol (the concatenation of two JSON objects does not produce a valid JSON object). Introduction JSON is a popular format for exchanging object data between systems. Frequently there's a need for a stream of objects to be sent over a single connection, such as a stock ticker or application log records. In these cases there's a need to identify where one JSON encoded object ends and the next begins. Technically this is known as framing. There are four common ways to achieve this: * Send the JSON objects ''formatted without newlines'' and use a newline as the delimiter. * Send the JSON objects concatenated with a record separator control character as the delimiter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SFA GeometryCollection
SFA may refer to: In science and technology In medicine * Superficial femoral artery, a large artery in the thigh In chemistry * Saturated fatty acid, a type of fatty acid with no double bonds * Segmented flow analysis, a technique and class of instrument used in chemical analysis * Sodium fluoroacetate, an organofluorine chemical compound, and the sodium salt of fluoroacetic acid In physical science and engineering * Substance flow analysis, a method of analyzing the flows of a material in a well-defined system * Surface forces apparatus, a scientific instrument and technique * Svenska Flygmotor Aktiebolaget late 1940s Swedish aero-engine manufacturer Other uses in science and technology * Sales force automation, information systems used in customer relationship marketing * Simple feature access, a standard storage and access model for geographical data * Single Frequency Approach, an aviation procedure * Stochastic Frontier Analysis, a method of economic modeling * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
