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22nd Street station (Caltrain)

1907 establishments in CaliforniaCaltrain stations in San FranciscoFormer Southern Pacific Railroad stations in CaliforniaMission District, San FranciscoPotrero Hill, San Francisco
Railway stations in the United States opened in 1907San Francisco Bay Area railway station stubsSan Francisco building and structure stubsUse mdy dates from December 2022
22nd Street station facing south, November 2017
22nd Street station facing south, November 2017

22nd Street station is a Caltrain commuter rail station located south of 22nd Street between the Dogpatch and Potrero Hill neighborhoods of San Francisco, California beneath the Interstate 280 freeway viaduct. The only below-grade Caltrain station, it is bracketed on the north and south by two tunnels which take the line under the eastern slope of Potrero Hill. The station is reached only by stairways from 22nd Street and Iowa Street – there are no ramps or elevators between the platforms and street level – and is thus not accessible. The narrow stairways create bottlenecks, especially when northbound trains arrive. A December 2021 study recommended the installation of ramps as an interim accessibility measure pending future reconstruction or relocation.The station opened when the Southern Pacific Railroad built the Bayshore Cutoff in 1907. The station was originally known as 23rd Street. The former wooden stairways were replaced with metal stairs in 2007.The station is also served by Muni routes 15, 48 and 55. The T Third Street’s 23rd Street station is located about 0.4 miles (0.64 km) away from this station, offering an indirect connection.Under the Pennsylvania Avenue alternative of the Downtown Rail Extension project, Caltrain tracks would be placed in a new tunnel north of 22nd Street. The existing station would be replaced by a new station, either at the existing site, or potentially north at Mariposa Street or south at Cesar Chavez Street.

Excerpt from the Wikipedia article 22nd Street station (Caltrain) (License: CC BY-SA 3.0, Authors, Images).

22nd Street station (Caltrain)
John F Foran Freeway, San Francisco

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N 37.757222222222 ° E -122.3925 °
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John F Foran Freeway

John F Foran Freeway
94124 San Francisco
California, United States
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22nd Street station facing south, November 2017
22nd Street station facing south, November 2017
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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.