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Map projection

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. Related:  `test 1023

L’Or du Rhin en direct du MET : halte au progrès ? | Forum Opéra On n’arrête pas le progrès. Depuis 2006, les mélomanes du monde entier – ou presque – peuvent assister en direct aux représentations du Metropolitan Opera de New York dans l’une des 1500 salles de cinéma qui participent à l’opération. L’Or du Rhin ouvrait samedi dernier la saison 2010-2011. Caméras haute définition, son labellisé « 5.1 » se plaçaient cette fois au service d’une mise en scène signée Robert Lepage qui, elle aussi, ne lésine pas sur les nouvelles technologies. Et si justement il fallait arrêter le progrès ? Samedi 9 octobre, dix-huit heures trente, Gaumont Opéra, boulevard des Italiens, Paris. Déroutant : nous sommes à la fois au cinéma et à l’opéra et nous n’y sommes pas. Dix-neuf heures. Dix-neuf heures vingt : James Levine entre en fosse. La descente au Nibelung © Ken Howard/AP Pas plus que nous saurons quelle mine faisait Wotan pendant que Fafner assommait Fasolt. D’autant que ce qu’on nous donne à voir n’est pas à la hauteur de nos attentes.

Scavenger hunt A scavenger hunt is a party game in which the organizers prepare a list defining specific items, which the participants – individuals or teams – seek to gather all items on the list – usually without purchasing them – or perform tasks or take photographs of the items, as specified.[1] The goal is usually to be the first to complete the list, although in a variation on the game players can also be challenged to complete the tasks on the list in the most creative manner. According to game scholar Markus Montola, scavenger hunts evolved from ancient folk games.[2] Gossip columnist Elsa Maxwell popularized scavenger hunts in the United States with a series of exclusive New York parties starting in the early 1930s.[3][4][5] The scavenger-hunt craze among New York's elite was satirized in the 1936 film My Man Godfrey, where one of the items socialite players are trying to collect is a homeless man.[6]

Textbook A textbook or coursebook (UK English) is a manual of instruction in any branch of study. Textbooks are produced according to the demands of educational institutions. Schoolbooks are textbooks and other books used in schools.[1][2] Although most textbooks are only published in printed format, many are now available as online electronic books. History[edit] The ancient Greeks wrote texts intended for education. The Greek philosopher Socrates (469–399 B.C.) lamented the loss of knowledge because the media of transmission were changing.[3] Before the invention of the Greek alphabet 2,500 years ago, knowledge and stories were recited aloud, much like Homer's epic poems. The next revolution for books came with the 15th-century invention of printing with changeable type. Compulsory education and the subsequent growth of schooling in Europe led to the printing of many standardized texts for children. Technological advances change the way people interact with textbooks. Market[edit] Bundling[edit]

Fundamentals of Mapping Some Commonly Used Map Projections This section outlines the features of a selection of more commonly used projects. It is by no means a full list projections which are commonly used today. Also, it describes each projection in its simplest form (eg only one Standard Parallel not two). Contents Introduction Comparison of these projections: Azimuthal Projection – Stereographic The oldest known record of this projection is from Ptolemy in about 150 AD. Today, this is probably one of the most widely used Azimuthal projections. This is a conformal projection in that shapes are well preserved over the map, although extreme distortions do occur towards the edge of the map. One interesting feature of the Stereographic projection is that any straight line which runs through the centre point is a Great Circle. These are two examples of maps using Stereographic projection over polar areas. Produced Using G.PROJECTOR – software developed by NASA and the Goddard Institute for Spatial Studies. UTM Zones

Map Projections Hide and seek Mercator Projection by Matt T. Rosenberg The Mercator projection was developed in 1569 by Gerardus Mercator as a navigation tool. Like the Peters map, the grid is rectangular and lines of latitude and longitude are all parallel. The Mercator map was designed as an aid to navigators since straight lines on the Mercator projection are loxodromes or rhumb lines -- representing lines of constant compass bearing -- perfect for "true" direction. If a navigator wishes to sail from Spain to the West Indies, all they have to do is draw a line between the two points and the navigator knows which compass direction to continually sail to reach their destination. The Mercator map has always been a poor projection for a world map yet due to its rectangular grid and shape, geographically illiterate publishers found it useful for wall maps, atlas maps, and maps in books and newspapers published by non-geographers. Mercator Projection Next page > Alternatives > Page 1, 2, 3 Articles by Date | Articles by Topic

L’impression 3D par la pensée, pour bientôt ? Une entreprise Chillienne développe à l’aide d’un neurocasque une technologie permettant de modéliser un objet par la pensée, avant de transférer le résultat à une imprimante 3D pour matérialiser l’objet. Le procédé, qui n’est pour l’instant pas encore à un stade de développement très avancé, s’adresse pour l’instant aux enfants et aux écoles. Si Elon Musk est le premier à crâner en présentant au monde son labo façon Iron Man, une petite entreprise Chilienne, Thinker Thing, envisage de pousser encore plus loin en proposant un moyen de contrôler la modélisation d’un objet directement par l’esprit. Cette technologie repose sur un casque Emotiv Epoc, un outil de plus en plus utilisé dans les expériences d’interfaces entre humain et machine. Le principe est simple : le programme fait évoluer un modèle 3D en fonction de différents patterns, en se basant sur les réactions captées par le neurocasque pour déterminer si la forme modélisée se rapproche ou non de celle voulue par l’utilisateur.

Map: Vaccine-Preventable Outbreaks | Introduction This interactive map visually plots global outbreaks of measles, mumps, whooping cough, polio, rubella, and other diseases that are easily preventable by inexpensive and effective vaccines. Red triangles indicate attacks on vaccinators and healthcare workers, as well as announcements from both governments and non-state actors that have had an impact—either positive or negative—on the successful implementation of vaccination programs. The Global Health Program at the Council on Foreign Relations has been tracking reports by news media, governments, and the global health community on these outbreaks since the fall of 2008. On to the Vaccine-Preventable Outbreaks map Mapping Projection vidéo by battleROYAL created a major production in celebration of the 125th anniversary of MADSACK Mediengruppe. MADSACK invited the city of Hannover to join them in celebrating their anniversary with an open-air festival and spectacular show event. 50,000 visitors gathered in the heart of the city for an evening of live performance, music, and entertainment. Hosted by Barbara Schöneberger, the stage program featured musical performances by Mousse T & Band, Lukas Rieger, Spax, Michael Schulte, Sarah Lombardi, Lions Head, and Sasha. For the grand finale of the night, battleROYAL developed an innovative show experience combining live performance with advanced mapping and video design. The team turned the facade of MADSACK’s Anzeiger Hochhaus into both a vertical stage and multimedia installation, rising 50 metres over the crowd. Stunning imagery and powerful music combined with historical facts from MADSACK Mediengruppe wow’d the audience.

Liste des films en 3D - Wikipedia, l'encyclopédie libre This is a list of 3D films from 2005 onwards. The tables can be sorted by clicking the arrow icons in the column headers. Feature films[edit] Note: films listed as "Filmed in 2D" or "Rendered in 2D" in the Camera System column were converted to 3D during post-production. Short films[edit] See also[edit] External links[edit] References[edit] Marlboro car projection mapping

Les technologies de prototypage rapide Ce procédé développé en 1986 fut la première réelle technologie de prototypage rapide. Aujourd'hui la stéréolithographie est utilisée dans le monde entier. Sous l'action d'un laser, une résine liquide photosensitive est solidifiée par une transformation chimique. Le faisceau de lumière émis par le laser est projeté à la surface de la résine par un jeu de miroirs dynamiques. Le mouvement de ces miroirs, pilotés par un ordinateur interprétant les données fournies par le logiciel de CAO fait parcourir au faisceau une trajectoire correspondant à une section de pièce considérée. Sur son passage, le laser polymérise la résine et seule la région balayée reste solidifiée.