What are queries in GIS?

What are queries in GIS? One of the defining characteristics of GIS is the ability to ask questions (and get answers) in a spatial context. These questions or queries are requests for information that are posed in a specific fashion. Queries are expressed in a formal way using Structured Query Language (SQL). What level of […]

Who invented metros?

Who invented metros? The first subway system was proposed for London by Charles Pearson, a city solicitor, as part of a city-improvement plan shortly after the opening of the Thames Tunnel in 1843. When were metro invented? The London Underground, which opened in 1863, was the world’s first underground railway system. More than 30,000 passengers […]

What happened to the 1972 terrorists?

What happened to the 1972 terrorists? The Munich Olympics opened on August 26, 1972, with 195 events and 7,173 athletes representing 121 countries. After negotiations to free the nine Israelis broke down, the terrorists took the hostages to the Munich airport. Once there, German police opened fire from rooftops and killed three of the terrorists. […]

How was the Nigerian civil war executed?

How was the Nigerian civil war executed? Biafra, civil war and death When the Nigerian Army invaded Biafra on 6 July 1967, Ojukwu sent Banjo and Major Albert Okonkwo to invade Nigeria. They were executed by firing squad on 22 September 1967. Where is Biafra located in Africa? Biafra, officially the Republic of Biafra, was […]

When did Mao Zedong take over China?

When did Mao Zedong take over China? On October 1, 1949, Chairman Mao Zedong officially proclaimed the founding of the People’s Republic of China at Tiananmen Square. Chiang Kai-shek, 600,000 Nationalist troops and about two million Nationalist-sympathizer refugees retreated to the island of Taiwan. What happened in China after Mao Zedong’s death in 1976? In […]

What did the Mongols do for a living?

What did the Mongols do for a living? Introduction. The Mongolian pastoral nomads relied on their animals for survival and moved their habitat several times a year in search of water and grass for their herds. Their lifestyle was precarious, as their constant migrations prevented them from transporting reserves of food or other necessities. How […]

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