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The nearly perfect squareness and north–south orientation of the Great Pyramid of Giza, built c. 2700 BC, affirm the Egyptians' command of surveying. [2]A recent reassessment of Stonehenge (c.2500 BC) suggests that the monument was set out by prehistoric surveyors using peg and rope geometry.
Vietnam, [e] [f] officially the Socialist Republic of Vietnam, [g] [h] is a country at the eastern edge of mainland Southeast Asia, with an area of about 331,000 square kilometres (128,000 sq mi) and a population of over 100 million, making it the world's fifteenth-most populous country.
An as-built survey is also known as a 'works as executed survey'. As built surveys are often presented in red or redline and laid over existing plans for comparison with design information. Cadastral or boundary surveying : a survey that establishes or re-establishes boundaries of a parcel using a legal description .
During the survey, seven officials died after stepping on mines in what is now the lake area. Before the official construction, some rubber plantation owners had intended to build a lake in the area for recreational purposes. [11] Before the official construction, many auxiliary dams were built by the Vietnamese military starting in 1977. [11]
The Vietnamese Wikipedia (Vietnamese: Wikipedia tiếng Việt) is the Vietnamese-language edition of Wikipedia, a free, publicly editable, online encyclopedia supported by the Wikimedia Foundation. Like the rest of Wikipedia, its content is created and accessed using the MediaWiki wiki software.
If a survey has been carried out for the population as a whole (for example, a nation or statewide survey), the sample size within any particular small area may be too small to generate accurate estimates from the data.
The forest cover in the park is of the order of 96.2% of primary forest. In April 2009, a group of cave explorers from the British Caving Association conducted surveys in this park and adjacent areas. The biggest chamber of Sơn Đoòng cave is about 4.5 kilometres (2.8 mi) in length, 140 by 140 metres (460 by 460 ft) in size was discovered. [19]
This is a timeline of Vietnamese history, comprising important legal and territorial changes and political events in Vietnam and its predecessor states. To read about the background to these events, see History of Vietnam. This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. Prehistory ...