Coordinates: 38°01′11″N121°51′05″W / 38.01972°N 121.85139°W
A geographic coordinate system is a coordinate system that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position and two or three of the numbers represent a horizontal position; alternatively, a geographic position may be expressed in a combined three-dimensional Cartesian vector. A common choice of coordinates is latitude, longitude and elevation. To specify a location on a plane requires a map projection.
| Hooper | |
|---|---|
| Former settlement | |
  Hooper Location in California | |
| Coordinates: 38°01′11″N121°51′05″W / 38.01972°N 121.85139°W | |
| Country | United States |
| State | California |
| County | Contra Costa County |
| Elevation [1] | 16 ft (5 m) |
Hooper is a former settlement in Contra Costa County, California. It was located on the Atchison, Topeka and Santa Fe Railroad 2.25 miles (3.6 km) west of Antioch, [2] at an elevation of 16 feet (5 m). It still appeared on maps as of 1918.
Contra Costa County is a county in the state of California in the United States. As of the 2010 census, the population was 1,049,025. The county seat is Martinez. It occupies the northern portion of the East Bay region of the San Francisco Bay Area, and is primarily suburban. The county's name is Spanish for "opposite coast", referring to its position on the other side of the bay from San Francisco. Contra Costa County is included in the San Francisco–Oakland–Hayward, CA Metropolitan Statistical Area.
California is a state in the Pacific Region of the United States. With 39.6 million residents, California is the most populous U.S. state and the third-largest by area. The state capital is Sacramento. The Greater Los Angeles Area and the San Francisco Bay Area are the nation's second and fifth most populous urban regions, with 18.7 million and 9.7 million residents respectively. Los Angeles is California's most populous city, and the country's second most populous, after New York City. California also has the nation's most populous county, Los Angeles County, and its largest county by area, San Bernardino County. The City and County of San Francisco is both the country's second-most densely populated major city after New York City and the fifth-most densely populated county, behind only four of the five New York City boroughs.
Antioch is the second largest city in Contra Costa County, California, United States. Located in the East Bay region of the San Francisco Bay Area along the San Joaquin-Sacramento River Delta, it is a suburb of San Francisco and Oakland. The city's population was 102,372 at the 2010 census and estimated to be 110,542 in 2015.
