Unmanned vehicles/systems technology is an emerging technology in recent years. Unmanned vehicles play a more significant role in many civil and military applications, such as remote sensing, surveillance, precision agriculture, and rescue operations rather than manned systems. The UAVs can gather photographs faster and more accurately than satellite imagery, allowing for more accurate assessment. This study provides a comprehensive overview of UAV civil applications, including classification and requirements. Also encompassed are research trends, critical civil challenges, and future insights on UAVs.
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