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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Drone with thermal infrared camera provides high resolution georeferenced imagery of the Waikite geothermal area, New Zealand
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Drone with thermal infrared camera provides high resolution georeferenced imagery of the Waikite geothermal area, New Zealand

机译：带有红外热像仪的无人机可提供新西兰威基特地热区的高分辨率地理参考图像

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摘要

Drones are now routinely used for collecting aerial imagery and creating digital elevation models (DEM). Light-weight thermal sensors provide another payload option for generation of very high-resolution aerial thermal orthophotos. This technology allows for the rapid and safe survey of thermal areas, often present in inaccessible or dangerous terrain. Here we present a 2.2 km(2) georeferenced, temperature-calibrated thermal orthophoto of the Waikite geothermal area, New Zealand. The image represents a mosaic of nearly 6000 thermal images captured by drone over a period of about 2 weeks. This is thought by the authors to be the first such image published of a significant geothermal area produced by a drone equipped with a thermal camera. Temperature calibration of the image allowed calculation of heat loss (43 +/- 12 MW) from thermal lakes and streams in the survey area (loss from evaporation, conduction and radiation). An RGB (visible spectrum) orthomosaic photo and digital elevation model was also produced for this area, with ground resolution and horizontal position error comparable to commercially produced LiDAR and aerial imagery obtained from crewed aircraft. Our results show that thermal imagery collected by drones has the potential to become a key tool in geothermal science, including geological, geochemical and geophysical surveys, environmental baseline and monitoring studies, geotechnical studies and civil works. (C) 2016 Elsevier B.V. All rights reserved.
机译：现在，无人机通常用于收集航空影像并创建数字高程模型（DEM）。轻巧的热传感器为生成超高分辨率的航空热正射影像提供了另一种有效载荷选择。这项技术可以对安全区域进行快速安全的调查，这些区域通常位于难以接近或危险的地形中。在这里，我们介绍了新西兰Waikite地热区的2.2 km（2）地理参考，温度校准的热正射影像。该图像代表无人机在大约2周的时间内捕获的近6000张热图像的镶嵌图。作者认为这是由配备有热像仪的无人机产生的重要地热区域的第一个此类图像。图像的温度校准允许计算调查区域中热湖和溪流的热损失（43 +/- 12 MW）（蒸发，传导和辐射造成的损失）。还为该区域制作了RGB（可见光谱）正射影像和数字高程模型，其地面分辨率和水平位置误差可与商业生产的LiDAR和从机载飞机获得的航拍图像相媲美。我们的结果表明，无人机收集的热图像有可能成为地热科学中的关键工具，包括地质，地球化学和地球物理调查，环境基线和监测研究，岩土研究和土木工程。 （C）2016 Elsevier B.V.保留所有权利。

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