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You survey land, people, things etc. out in the open. Surveillance would be done under cover or just observing something for a long period of time in the open.
Also, a survey is like a poll, a bunch of questions.
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DevinSurveillance involves monitoring individuals or entities for the purpose of gathering information or maintaining security. A survey, on the other hand, is a data collection technique used to gather information about a population's characteristics, opinions, or behaviors. Surveillance is typically more targeted and focused on specific individuals, whereas surveys are broader in scope and aim to generalize findings to a larger group.
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