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20th Street station (Muni Metro)

Muni Metro stationsRailway stations in the United States opened in 2007San Francisco Bay Area railway station stubsSan Francisco building and structure stubsSan Francisco metro stubs
Northbound train at 20th Street station, January 2018
Northbound train at 20th Street station, January 2018

20th Street station (also signed as Dogpatch) is a light rail station on the Muni Metro T Third Street line in the Dogpatch neighborhood of San Francisco, California. The station opened with the T Third Street line on January 13, 2007. It has two side platforms; the northbound platform is north of 20th Street, and the southbound platform south of 20th Street, so that trains can pass through the intersection before the station stop. The station is also served by bus routes 15, 48 and 55, plus the T Bus and 91 Owl bus routes, which provide service along the T Third Street line during the early morning and late night hours respectively when trains do not operate.

Excerpt from the Wikipedia article 20th Street station (Muni Metro) (License: CC BY-SA 3.0, Authors, Images).

20th Street station (Muni Metro)
3rd Street, San Francisco

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Wikipedia: 20th Street station (Muni Metro)Continue reading on Wikipedia

Geographical coordinates (GPS)

Latitude Longitude
N 37.76036 ° E -122.38855 °
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Address

3rd Street

3rd Street
94158 San Francisco
California, United States
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Northbound train at 20th Street station, January 2018
Northbound train at 20th Street station, January 2018
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GeoVector

GeoVector Corporation (originally named Criticom Corporation) began conducting research into augmented reality in early 1990s. The company, co-founded by John Ellenby, who also founded laptop pioneer GRiD Systems Corporation, devised a method to use sensors in a device to associate relevant digital information with places on earth. The basic concept around which most of GeoVector's R&D has focused is that knowing the position and orientation of the device allows the application to provide digital information associated with a place in the real world. Position and direction data can be used to create a virtual vector which intersects with objects indexed in databases by their latitude and longitude coordinates. GeoVector's first patent in this domain, since issued as 5,815,411, was filed September 10, 1993. The company originally held the trademark for "Augmented Reality" (issued in 1995) but abandoned it as the term was generally adopted to describe this technique. Early GeoVector work focused on providing vertical solutions. One GeoVector augmented reality design used compass equipped binoculars along with GPS to superimpose nautical maps on the visual horizon thus improving the safety of navigation. A video showing early Augmented Reality concepts from GeoVector can be seen here GeoVector then discovered that their basic technology would improve the user experience on handheld devices delivering location aware applications. In this instance, actually viewing the real object was not necessary. Simply being able to refine the search for location information by knowing the direction of user interest or the specific object of his attention would be a significant benefit. The GeoVector team then implemented what they now refer to as the "pointing" feature.In 1998, "Clipper" project was initiated. The company built a prototype device known internally as The "Little Guy", a handheld "pointable" information appliance independent of a visual or video element. Since that time GeoVector has worked closely with sensor and device manufactures to encourage them to include GPS and compass elements in their products. In early 2006, there were sufficient pointing capable handsets in Japan for GeoVector to launch its first commercial product on the KDDI network with support of local partners NECM and Mapion. A video showing the functionality of Pointing is on YouTube.The company has continued its research and development in directional searching and augmented reality and has been awarded several patents in those areas. Further information about their intellectual property can be found on line at their website patent gallery.