• Oakland
  • Lighthouse

Oakland is the largest city and the county seat of Alameda County, California, United States. A major West Coast port, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the Bay Area and the eighth most populated city in California. With a population of 440,646 in 2020, it serves as the Bay Area's trade center and economic engine: the Port of Oakland is the busiest port in Northern California, and the fifth busiest in the United States of America. An act to incorporate the city was passed on May 4, 1852, and incorporation was later approved on March 25, 1854. Oakland is a charter city.

Oakland's territory covers what was once a mosaic of California coastal terrace prairie, oak woodland, and north coastal scrub. In the late 18th century, it became part of a large rancho grant in the colony of New Spain. Its land served as a resource when its hillside oak and redwood timber were logged to build San Francisco. The fertile flatland soils helped it become a prolific agricultural region. In the late 1860s, Oakland was selected as the western terminal of the Transcontinental Railroad. Following the 1906 San Francisco earthquake, many San Francisco citizens moved to Oakland, enlarging the population, increasing its housing stock, and improving its infrastructure. It continued to grow in the 20th century with its busy port, shipyards, and a thriving automobile manufacturing industry.

Lighthouse is a high tower-shaped building, lighting equipment should be installed in the tower, the location should be prominent, and pay attention to its specific architectural shape, easy for ships to distinguish, and become one of the highest points of the port. As the surface of the earth is curved, the tower must have sufficient height so that the light can be seen by long-distance ships, with a general line-of-sight distance of 15-25 nautical miles, but the light should not be too high so as not to be obscured by high clouds. According to the size and location of the lighthouse, the lighthouse can be guarded or unguarded, and important lighthouses should be guarded. ...
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