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built 280 days ago
Photographs and other images of the Earth taken from the air and from space show a great deal about the planet's landforms, vegetation, and resources. Aerial and satellite images, known as remotely sensed images, permit accurate mapping of land cover and make landscape features understandable on regional, continental, and even global scales. Transient phenomena, such as seasonal vegetation vigor and contaminant discharges, can be studied by comparing images acquired at different times.
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This source is primarily dedicated to aviation photographs, with an archive of 65,000 images of individual aircraft and aerial photographs of airports. A search engine enables the location of specified photographs by aircraft type, airline, category, country/airport and keywords. The site ... includes a small number of aviation-related discussion forums, covering general aviation, aviation interests as a hobby, aviation photography and photograph requests. It also features up-to-the-minute industry news, provided by PRNewswire, and an online shop, supplying a wide range of aviation-related books, videos and general goods. There is also a section dedicated to aircraft data and history that covers about 400 aircraft types and includes data like powerplants, production, performance etc. There is also a facility available for booking online air tickets and reserving hotel rooms.
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Cameras of various types are used to take aerial photographs. Although cameras have ... been carried on spacecraft such as the Space Shuttle, satellites more frequently use electronic scanners to record ground scenes in digital form. These sensors record reflected or emitted energy in the visible, near-infrared, and thermal-infrared portions of the spectrum. Satellite scanner data are commonly displayed as images whose colors resemble those of color-infrared aerial photographs, but the colors of a given image can be manipulated by computer to enhance landscape features. Although certain satellite images are distributed as photographic film or prints, they are more often distributed as digital products. Side-looking airborne radar (SLAR) instruments on aircraft or satellites generate their own energy, which is recorded on being reflected back to them from the ground.
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This gallery of photographs has been provided by the University of Cape Town. Present are four photo galleries from student groups and a selection of images from brochures prepared by the Geological Society of South Africa. Photographs include aerial views of Cape Town, Table Mountain, Cape Granite and the Malmesbury Group. The Geological Society images include: geological maps of Cape Town, Table Mountain and the Sea Point Contact, a topographic map of the region and a diagram illustrating the geological history of Cape Town.
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Non-digital photographs are produced with a two-step chemical process. In the two-step process the film holds a negative image (colors and lights/darks are inverted), which is then transferred onto photographic paper as a positive image. Another widely used film is the positive film used for producing transparencies, usually mounted in cardboard or plastic frames called slides. Slides are widely used by professionals due to their sharpness and accuracy of color rendition. Most photographs published in magazines are taken on color transparency film.
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The Photo Marketing Association ("PMA") this week released data on digital photo printing through various retail channels . According to the PMA report (download PDF file here), 2007 was another excellent year for processors of prints from digital photographs. Overall, prints made from digital images increased 46%, while online ordering as a sales channel grew at a rate of 114%, in the 12 months ended January 2007. Households ordered 11.5% of their digital photos online and had them delivered via mail, compared with a 9.4% market share in the corresponding year-earlier period.
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