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GIS - Stack Exchange

GIS - Stack Exchange
Related:  Idiots Guide to GIS

Map projection More generally, the surfaces of planetary bodies can be mapped even if they are too irregular to be modeled well with a sphere or ellipsoid; see below. Even more generally, projections are the subject of several pure mathematical fields, including differential geometry and projective geometry. However "map projection" refers specifically to a cartographic projection. Background[edit] Maps can be more useful than globes in many situations: they are more compact and easier to store; they readily accommodate an enormous range of scales; they are viewed easily on computer displays; they can facilitate measuring properties of the terrain being mapped; they can show larger portions of the Earth's surface at once; and they are cheaper to produce and transport. However, Carl Friedrich Gauss's Theorema Egregium proved that a sphere's surface cannot be represented on a plane without distortion. For simplicity most of this article assumes that the surface to be mapped is that of a sphere.

carto:net - cartographers on the net Блоги Гис-Лаб Итак, меня практически заставили сделать это подавляющим числом голосов на встрече, теперь мне очень интересно будет посмотреть, как же это будет использоваться Встречайте Блоги GIS-Lab ака "Песочница" (начало обсуждения). Главная страница, она же агрегатор всех блогов: персонального блога: агрегатора: Идея: Каждый может создать себе блог на GIS-Lab и писать туда что угодно. Нюансы:1. 7. Free and Open Source GIS Ramblings | written by Anita Graser aka Underdark Geographic information system - Wikipedia, the free encyclopedia A geographic information system (GIS) is a computer system designed to capture, store, manipulate, analyze, manage, and present all types of spatial or geographical data. The acronym GIS is sometimes used for geographical information science or geospatial information studies to refer to the academic discipline or career of working with geographic information systems and is a large domain within the broader academic discipline of Geoinformatics.[1] What goes beyond a GIS is a spatial data infrastructure, a concept that has no such restrictive boundaries. In a general sense, the term describes any information system that integrates, stores, edits, analyzes, shares, and displays geographic information. GIS is a broad term that can refer to a number of different technologies, processes, and methods. History of development[edit] Computer hardware development spurred by nuclear weapon research led to general-purpose computer "mapping" applications by the early 1960s.[8] In 1964 Howard T.

GPS eXchange Format GPX, or GPS eXchange Format is an XML schema designed as a common GPS data format for software applications. It can be used to describe waypoints, tracks, and routes. The format is open and can be used without the need to pay license fees. Data types[edit] This is the essential data contained in GPX files. wpType: lat="DD.thm..." lon="DDD.thm..." plus other data: is the WGS 84 (GPS) coordinates of a point and other description. <wpt> wptType </wpt> is an individual waypoint among a collection of points with no sequential relationship, despite the name (the county towns of England, say, or all Skyscrapers in New York). <trk><trkseg><trkpt wpType />... <rte><rtept>wpType</rtept> ... Conceptually, tracks are a record of where a person has been, routes are suggestions about where they might go in the future. Technically, a track is made of a sufficient number of waypoints to precisely draw every bend of a path on a bitmap. Units[edit] Sample GPX document[edit] See also[edit] External links[edit]

Travailler au CNRS Navigation du site Accueil > Travailler au CNRS > Devenir ingénieur, technicien > Recrutement temporaire Ingénieur, technicienRecrutement temporaire Afin de satisfaire des besoins d'emploi ponctuel, le CNRS recrute tout au long de l'année dans des fonctions correspondant à des métiers d'accompagnement de la recherche. Ces fonctions sont diverses avec un niveau de formation allant du BEP au doctorat. Les dernières offres sont disponibles sur le portail emploi du CNRS Pour en savoir plus Voir aussi Autour de ce document En un clic haut de page Réseaux sociaux Underdark blog Free Geography Tools NTICS: Que son las Ntics La Ntics en Colombia un importante aporte para nuestras generaciones. a. Que se conoce como NTIC´s Las tecnologías de la información y la comunicación (TIC) son un conjunto de servicios, redes, software y dispositivos que tienen como fin la mejora de la calidad de vida de las personas dentro de un entorno, y que se integran a un sistema de información interconectado y complementario. Las nuevas tecnologías de la información se refieren a todos los nuevos medios que, en los últimos años, han facilitado el flujo de información (internet, el videodisco digital [DVD], los computadores portátiles y todos los aparatos tecnológicos que sirven para producir, desarrollar y llevar a cabo la comunicación). Las Tecnologías de y Comunicaciones ofrecen una oportunidad única para que los países en vía de desarrollo den un salto en su evolución económica, política, social y cultural, disminuyendo la brecha que los separa de los países desarrollados. b. c. Foro, email, chat, blog, celulares, wiki etc.

Related:  TUTO-GIS