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Tiree (Scottish Gaelic: Tiriodh, pronounced ˈtʲʰiɾʲəɣ) is the most westerly island in the Inner Hebrides of Scotland.The low-lying island, southwest of Coll, has an area of 7,834 hectares (30 1 ⁄ 4 square miles) and a population of around 650. Alluvium Gallery. Louis, MO. 314-432-7522 Kansas City, KS. 913-221-0436 Omaha, NE. 402-609-7585 Indianapolis, IN. 317-644-1200 Columbus, OH. 614. Alluvium Primer is designed to turn massive streams of complex machine and operator data into simple, real-time insights. At the core of our platform is our proprietary Stability Score™, which combines state-of-the-art, real-time artificial intelligence with expert human interpretation.

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The National Map is a suite of products and services that provide access to base geospatial information to describe the landscape of the United States and its territories. The National Map embodies 11 primary products and services and numerous applications and ancillary services.

The National Map supports data download, digital and print versions of topographic maps, geospatial data services, and online viewing. Customers can use geospatial data and maps to enhance their recreational experience, make life-saving decisions, support scientific missions, and for countless other activities. Nationally consistent geospatial data from The National Map enable better policy and land management decisions and the effective enforcement of regulatory responsibilities. The National Map is easily accessible for display on the Web through such products as topographic maps and services and as downloadable data. The geographic information available from The National Map includes boundaries, elevation, geographic names, hydrography, land cover, orthoimagery, structures, and transportation.

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The majority of The National Map effort is devoted to acquiring and integrating medium-scale (nominally 1:24,000 scale) geospatial data for the eight base layers from a variety of sources and providing access to the resulting seamless coverages of geospatial data. The National Map also serves as the source of base mapping information for derived cartographic products, including 1:24,000 scale US Topo maps and georeferenced digital files of scanned historic topographic maps. Data sets and products from The National Map are intended for use by government, industry, and academia—focusing on geographic information system (GIS) users—as well as the public, especially in support of recreation activities. Other types of georeferenced or mapping information can be added within The National Map Viewer or brought in with The National Map data into a GIS to create specific types of maps or map views and (or) to perform modeling or analyses.

Use and Download our Data and MAPS!

National Map GIS data download and other related applications for working with our topographic data are available on our Data Delivery site.

The National Map (TNM) supporting themes include boundaries, elevation, geographic names, hydrography, land cover, orthoimagery, structures, and transportation. Other types of georeferenced or mapping information can be added within TNM Viewer or brought in with TNM data into a GIS to create specific types of maps or map views and (or) to perform modeling or analyses.

The 3D Elevation Program (3DEP) is managed by the USGS National Geospatial Program on behalf of the broader community with a goal of complete acquisition of nationwide lidar (IfSAR in AK) in 8 years to provide the first-ever national baseline of consistent high-resolution elevation data – both bare earth and 3D point clouds – collected in a time-frame of less than a decade. We also continue to be ready to meet growing needs for higher quality data, repeat coverage, and new products and services. These data serve government, public and private sector needs for a wide range of activities that include flood hazard mapping, precision agriculture, infrastructure planning and development, natural resource management, environmental assessment and a host of other applications.

NMCorps is an online crowdsourcing mapping project with volunteers successfully editing structures in all 50 States, Puerto Rico, and the U.S. Virgin Islands.

As part ofThe National Map, structures include schools, hospitals, post offices, police stations, cemeteries, and other important public buildings. By updating and verifying structures data, volunteers are making significant contributions to USGS National Structures Database, The National Map, and ultimately U.S. Topo Maps!

Anyone with an interest in contributing can volunteer. It is easy to sign up and get started! All you need is access to the internet, an email address, and a willingness to learn. “How to” documentation including a comprehensive User Guide and a Quick Start Guide will have you up and editing quickly. Begin editing in your own hometown or anywhere in the U.S., Puerto Rico, and the U.S. Virgin Islands.

Volunteers earn virtual badges for participating and are recognized for their contributions (with permission) via USGS and The National Map social media.

P2PTV refers to peer-to-peer (P2P) software applications designed to redistribute video streams in real time on a P2P network; the distributed video streams are typically TV channels from all over the world but may also come from other sources. The draw to these applications is significant because they have the potential to make any TV channel globally available by any individual feeding the stream into the network where each peer joining to watch the video is a relay to other peer viewers, allowing a scalable distribution among a large audience with no incremental cost for the source.

Technology and use[edit]

In a P2PTV system, each user, while downloading a video stream, is simultaneously also uploading that stream to other users, thus contributing to the overall available bandwidth. The arriving streams are typically a few minutes time-delayed compared to the original sources. The video quality of the channels usually depends on how many users are watching; the video quality is better if there are more users.The architecture of many P2PTV networks can be thought of as real-time versions of BitTorrent: if a user wishes to view a certain channel, the P2PTV software contacts a 'tracker server' for that channel in order to obtain addresses of peers who distribute that channel; it then contacts these peers to receive the feed. The tracker records the user's address, so that it can be given to other users who wish to view the same channel.In effect, this creates an overlay network on top of the regular internet for the distribution of real-time video content.

The need for a tracker can also be eliminated by the use of distributed hash table technology.

Some applications allow users to broadcast their own streams, whether self-produced, obtained from a video file, or through a TV tuner card or video capture card. Many of the commercial P2PTV applications were developed in China (TVUPlayer, PPLive, QQLive, PPStream). The majority of available applications broadcast mainly Asian TV stations, with the exception of TVUPlayer, which carries a number of North American stations including CBS, Spike TV, and Fox News. Some applications distribute TV channels without a legal license to do so; this utilization of P2P technology is particularly popular to view channels that are either not available locally, or only available by paid subscription, as is the case for some sports channels.^[1] Distributing links to pirated P2PTV feeds on a U.S.-based Web site can result in the U.S. government seizing the Web site, as it did with several P2PTV aggregation sites prior to Super Bowl XLV.^[2] By January 2009, there were about 14,000 P2P channels on PPStream.

Other commercial P2PTV applications outside China are Abroadcasting (USA), Zattoo (Switzerland/USA), Octoshape (Denmark), LiveStation (UK).

Issues for broadcasters[edit]

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• Broadcasting via a P2PTV system is usually much cheaper than the alternatives and can be done by private individuals.
• No quality of service (QoS). Compared to unicasting (the standard server-client architecture used in streaming media) no one can guarantee a reliable stream, since every user is a rebroadcaster. Each viewer is a part of a chain of viewers who can all have a negative influence on the reliability of the stream (by having a slow PC, a filled downlink or uplink or an unreliable consumer grade DSL or cable connection).
• Less control. If a broadcaster prefers to limit access to their content based on regions, and would like good data on viewer behaviour, such as volume, trends and viewing time, then a traditional broadcasting solution offers more control.
• Professional broadcasters and distributors have used a hybrid solution for many years. Distribution servers are not centrally installed, but are rolled out in a smart, decentralized way. A central management facility manages content distribution over multiple peer servers (also known as edge servers, or caches), strategically located near user swarms (generally popular access ISP networks), manages load balancing, redirection of users, view reporting and QoS. An example is Akamai.

Notable applications[edit]

Compared[edit]

Branded webtv service for end-users[edit]

• Afreeca – based in South Korea
• Funshion – based in China mainland
• Hypp.TV (live and non-live) – based in Malaysia
• Miro (non-live)
• PPLive – based in China mainland, Chinese only program.
• PPStream – based in China mainland
• QQLive – based in China mainland
• Zattoo.com (Windows, Linux, Mac)

Commercial solutions for broadcasters[edit]

• Alluvium – based in Texas, USA
• CDNetworks (CDN service)

Free P2P TV software for end users and amateur broadcasters[edit]

• Ace Stream - P2PTV software solution based in Russia and derived from BitTorrent

Unclassified (yet)[edit]

• Pulse – (Windows, Linux) LGPL P2PTV engine with announcement portal and unrestricted access

Discontinued services[edit]

• Babelgum.com (non-live, used peer-to-peer technology until March 2009)
• BBC iPlayer (live and non-live, used peer-to-peer technology until December 2008)
• CoolStreaming (discontinued service)
• Joost.com (non-live, live trials)
• LiveStation.com (Windows, Linux, Mac) – based in United Kingdom
• Sopcast^[4]
• Streamtorrent^[5]
• Tribler – linked to P2P-Next, relies on BitTorrent protocol
• TVUnetworks – P2PTV software (Windows and Mac OS X) and network (Discontinued, Service is shut down)

See also[edit]

References[edit]

1. ^Geoffrey A. Fowler; Sarah McBride (2 September 2005). 'Newest Export From China: Pirated Pay TV'. The Wall Street Journal. Archived from the original on March 10, 2016.Alt URL
2. ^Martinez, Jennifer (2011-02-02). Feds seize sports websites before Super Bowl. The Politico. Retrieved 2011-02-02.
3. ^'GitHub - Tribler/tribler-android'. 28 February 2019 – via GitHub.
4. ^'Archived copy'. Archived from the original on 2009-07-18. Retrieved 2019-04-14.CS1 maint: archived copy as title (link)
5. ^https://streamtorrentblog.wordpress.com/

Alluvium Mac OS