List of tallest buildings and structures in the world

The world's tallest artificial structure is the 829.8 m (2,722 ft) tall Burj Khalifa in Dubai, United Arab Emirates. The building gained the official title of "Tallest Building in the World" at its opening on January 4, 2010. It is followed by the Tokyo Skytree, as the tallest tower, and the KVLY-TV mast.
The Council on Tall Buildings and Urban Habitat, an organization that certifies buildings as the "World’s Tallest", recognizes a building only if at least fifty percent of its height is made up of floor^[1] Structures that do not meet this criterion, such as the CN Tower, are defined as "towers".
plates containing habitable floor area.
There are dozens of radio and television broadcasting towers which measure over 600 metres (about 2,000 ft) in height, and only the tallest are recorded in publicly a

Debate over definitions

The assessment of the height of artificial structures has been controversial. Various standards have been used by different organisations which has meant that the title of world's tallest structure or building has changed depending on which standards have been accepted. The aforementioned Council on Tall Buildings and Urban Habitat have changed their definitions over time. Some of the controversy regarding the definitions and assessment of tall structures and buildings has included the following:

• the definition of a structure, a building and a tower
• whether a structure, building or tower under construction should be included in any assessment
• whether a structure, building or tower has to be officially opened before it is assessed
• whether structures built in and rising above water should have their below-water height included in any assessment.
• whether a structure, building or tower that is guyed is assessed in the same category as self-supporting structures.

Within an accepted definition of a building further controversy has included the following factors:

• whether only habitable height of the building is considered
• whether communication towers with observation galleries should be considered "habitable" in this sense
• whether rooftop antennas, viewing platforms or any other architecture that does not form a habitable floor should be included in the assessment
• whether a floor built at a high level of a telecommunications or viewing tower should change the tower's definition to that of a "building"

.Tallest structures Main article: List of tallest structures in the worldWarsaw radio mast, the height record holder from 1974 to 1991.

The CN Tower in Toronto, Ontario, Canada, was the world's tallest freestanding structure from 1975 to 2007.

This category does not require the structure be "officially" opened.
The tallest artificial structure is Burj Khalifa, a skyscraper in Dubai that reached 829.8 m (2,722 ft) in height on January 17, 2009.^[2] By April 7, 2008 it had been built higher than the KVLY-TV mast in North Dakota, USA.^[3] That September it officially surpassed Poland's 646.38 m (2,120.7 ft) Warsaw radio mast, which stood from 1974 to 1991, to become the tallest structure ever built. Guyed lattice towers such as these masts had held the world height record since 1954.
The Petronius Platform stands 610 m (2,000 ft) off the sea floor leading some, including Guinness World Records 2007, to claim it as the tallest freestanding structure in the world. However, it is debated whether underwater height should be counted in the same manner as height below ground is ignored on buildings. The Troll A platform is 472 m (1,549 ft), without any part of that height being supported by wires. The tension-leg type of oil platform has even greater below-water heights with several examples more than 1,000 m (3,300 ft) deep. However, these platforms are not considered constant structures as the vast majority of their height is made up of the length of the tendons attaching the floating platforms to the sea floor. Despite this, Guinness World Records 2009 listed the Ursa tension leg platform as the tallest structure in the world with a total height of 1,306 m (4,285 ft). The Magnolia Tension-leg Platform in the Gulf of Mexico is even taller with a total height of 1,432 m (4,698 ft).
Taipei 101 in Taipei, Taiwan, set records in three of the four skyscraper categories at the time it opened in 2004; at the time the Burj Khalifa opened in 2010 it remained the world's tallest inhabited building 509.2 m (1,671 ft) as measured to its architectural height (spire). The height of its roof 449.2 m (1,474 ft) and highest occupied floor 439.2 m (1,441 ft) had been surpassed by the Shanghai World Financial Center with corresponding heights of 487 and 474 m (1,598 and 1,555 ft). Willis Tower (formerly Sears Tower) was the highest in the final category: the greatest height to top of antenna of any building in the world at 527.3 m (1,730 ft).
Burj Khalifa broke the height record in all four categories for completed buildings by a wide margin.

Organization

The images a Flickr photographer uploads go into their sequential "photostream", the basis of a Flickr account. All photostreams can be displayed as a justified view, a slideshow, a "detail" view or a datestamped archive. Clicking on a photostream image opens it in the interactive "photopage" alongside data, comments and facilities for embedding images on external websites.
Users may label their uploaded images with titles and descriptions, and images may be tagged either by the uploader or by other users, if the uploader permits it. These text components enable computer searching of Flickr. Flickr was an early website to implement tag clouds, which were used until 2013, providing access to images tagged with the most popular keywords.Tagging was further revised in the photopage redesign of March 2014. Flickr has been cited as a prime example of effective use of folksonomy.^[41]

Typical Flickr album sets

Users can organize their Flickr photos into "albums" (formerly "sets") which are more flexible than the traditional folder-based method of organizing files, as one photo can belong to one album, many albums, or none at all. Flickr provides code to embed albums into blogs, websites and forums. Flickr albums represent a form of categorical metadata rather than a physical hierarchy. Geotagging can be applied to photos in albums,^[42] and any albums with geotagging can be related to a map using imapflickr. The resulting map can be embedded in a website.^[43] Flickr albums may be organized into "collections", which can themselves be further organized into higher-order collections.
Organizr is a web application for organizing photos within a Flickr account that can be accessed through the Flickr interface. It allows users to modify tags, descriptions, and set groupings, and to place photos on a world map (a feature provided in conjunction with Yahoo Maps). It uses Ajax to emulate the look, feel, and quick functionality of desktop-based photo-management applications, such as Google's Picasa and F-Spot. Users can select and apply changes to multiple photos at a time,as an alternative to the standard Flickr interface for editing.

Wonders of the Modern World

New7Wonders of the World

From Wikipedia, the free encyclopedia

This artic is about the New7Wonders Foundation list. For other uses, see Wonders of the World.

From left to right, top to bottom: Chichen Itza, Christ the Redeemer, Great Wall of China, Machu Picchu, Petra, Taj Mahal, and Colosseum.

New7Wonders of the World (2000–2007) was an initiative started in 2000 as a Millennium project to choose Wonders of the World from a selection of 200 existing monuments.^[1] The popularity poll was led by Canadian-Swiss Bernard Weber and organized by the New7Wonders Foundation based in Zurich, Switzerland, with winners announced on 7 July 2007 in Lisbon.^[2][3]
The New7Wonders Foundation claimed that more than 100 million votes were cast through the Internet or by telephone. The voting via Internet was limited to one vote for seven monuments per person/identity, via telephone multiple voting was possible,^[4] so the poll was considered not scientific.^[5] According to John Zogby, founder and current President/CEO of the Utica, New York-based polling organization Zogby International, New7Wonders Foundation drove "the largest poll on record".^[6][5] After supporting the New7Wonders Foundation at the beginning of the campaign, by providing advice on nominee selection, the United Nations Educational, Scientific, and Cultural Organization (UNESCO) by its bylaws having to record all and give equal status to the world heritage sites distanced itself from the undertaking in 2001 and again in 2007.^[7][8]
The New7Wonders Foundation, established in 2001, relied on private donations and the sale of broadcast rights and received no public funding or taxpayers' money.^[9] After the final announcement, New7Wonders said it didn't earn anything from the exercise and barely recovered its investment.^[10]
The foundation has run two subsequent programs: New7Wonders of Nature, the subject of voting until 2011, and New7WondersCities, which wound up in 2014.^[11]