• San Jose
  • Lighthouse

San Jose,[A] officially San José (/ˌsæn hoʊˈzeɪ, -ˈseɪ/; Spanish: [saŋ xoˈse]; Spanish for 'Saint Joseph'),[B] is a major city in the U.S. state of California that is the cultural, financial, and political center of Silicon Valley and largest city in Northern California by both population and area. With a 2020 population of 1,013,240, it is the most populous city in both the Bay Area and the San Jose-San Francisco-Oakland Combined Statistical Area, which contain 7.7 million and 9.7 million people respectively, the third-most populous city in California (after Los Angeles and San Diego and ahead of San Francisco), and the tenth-most populous in the United States. Located in the center of the Santa Clara Valley on the southern shore of San Francisco Bay, San Jose covers an area of 179.97 sq mi (466.1 km2). San Jose is the county seat of Santa Clara County and the main component of the San Jose–Sunnyvale–Santa Clara Metropolitan Statistical Area, with an estimated population of around two million residents in 2018.

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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