City limits

The terms city limits and city boundary refer to the defined boundary or border of a city. The area within the city limits is sometimes called the city proper. The terms town limits/boundary and village limits/boundary mean the same as city limits/boundary, but apply to towns and villages. Similarly, the term corporate limits is a legal name that refers to the boundaries of municipal corporations. In some countries, the limits of a municipality may be expanded through annexation.

City limits in the United States and Canada

In the United States, such limits are usually formally described in a state, provincial, or territorial law (or an appropriate regulation) as being under the control of the municipal corporation or agency that constitutes the city government. It is customary to indicate city limits with the posting of signs on major freeways, highways, and arterial roads. Note that New England states have a unique concept of "towns", which are similar in size to the civil townships in other States, but empowered with the authority exercised by municipalities in other States.

Austin City Limits

Austin City Limits (ACL) is an American public television music program recorded live in Austin, Texas, by Public Broadcasting Service (PBS) member television station KLRU, and broadcast on many PBS stations around the United States. The show helped Austin to become widely known as the "Live Music Capital of the World", and is the only television show to receive the National Medal of Arts, which it was awarded in 2003. It also won a rare institutional Peabody Award in 2011 "for its more than three decades of presenting and preserving eclectic American musical genres."

Initially created to celebrate the music of Texas—featuring western swing, Texas blues, Tejano music, progressive country, and rock n' roll—the series has gone on to feature regional, national and international artists performing a wide range of musical styles, including jazz, alternative country, alternative rock, folk music, and jam band.

Austin City Limits is the longest-running music program in television history.

City

A city is a large and permanent human settlement. Although there is no agreement on how a city is distinguished from a town in general English language meanings, many cities have a particular administrative, legal, or historical status based on local law.

Cities generally have complex systems for sanitation, utilities, land usage, housing, and transportation. The concentration of development greatly facilitates interaction between people and businesses, benefiting both parties in the process, but it also presents challenges to managing urban growth.

A big city or metropolis usually has associated suburbs and exurbs. Such cities are usually associated with metropolitan areas and urban areas, creating numerous business commuters traveling to urban centers for employment. Once a city expands far enough to reach another city, this region can be deemed a conurbation or megalopolis. In terms of population, the largest city proper is Shanghai, while the fastest-growing is Dubai.

Origins

There is not enough evidence to assert what conditions gave rise to the first cities. Some theorists have speculated on what they consider suitable pre-conditions and basic mechanisms that might have been important driving forces.

San Francisco Bay Area

The San Francisco Bay Area is a populous region surrounding the San Francisco and San Pablo estuaries in Northern California. The region encompasses the major cities and metropolitan areas of San Francisco, Oakland, and San Jose, along with smaller urban and rural areas. The Bay Area's nine counties are Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma. Home to approximately 7.44 million people, the nine-county Bay Area contains many cities, towns, airports, and associated regional, state, and national parks, connected by a network of roads, highways, railroads, bridges, tunnels and commuter rail. The combined statistical area of the region is the second-largest in California (after the Greater Los Angeles area), the fifth-largest in the United States, and the 43rd-largest urban area in the world.

The United States Office of Management and Budget (OMB) does not use the nine-county definition of the San Francisco Bay Area. The OMB has designated a more extensive 12-county Combined Statistical Area (CSA) titled the San Jose-San Francisco-Oakland, CA Combined Statistical Area which also includes the three counties of San Joaquin, Santa Cruz, and San Benito that do not border San Francisco Bay, but are economically tied to the nine counties that do.

San Francisco Bay

San Francisco Bay is a shallow estuary that drains water from approximately 40% of California. Water from the Sacramento and San Joaquin rivers, and from the Sierra Nevada mountains, passes through the Bay to the Pacific Ocean. Specifically, both rivers flow into Suisun Bay, which flows through the Carquinez Strait to meet with the Napa River at the entrance to San Pablo Bay, which connects at its south end to San Francisco Bay. However, the entire group of interconnected bays is often called the San Francisco Bay.

San Francisco Bay is in the U.S. state of California, surrounded by a contiguous region known as the San Francisco Bay Area (often simply "the Bay Area"), dominated by the large cities San Francisco, Oakland, and San Jose. The waterway entrance to San Francisco Bay from the Pacific Ocean is called the Golden Gate. Across the strait spans the Golden Gate Bridge. The bay was designated a Ramsar Wetland of International Importance on February 2, 2013.

Size

The bay covers somewhere between 400 and 1,600 square miles (1,040 to 4,160 square kilometers), depending on which sub-bays (such as San Pablo Bay), estuaries, wetlands, and so on are included in the measurement. The main part of the Bay measures 3 to 12 miles (5 to 20 km) wide east-to-west and somewhere between 48 miles (77 km)¹ and 60 miles (97 km)² north-to-south. It is the largest Pacific estuary in the Americas.