Intercomparison of UAV, Aircraft and Satellite Remote Sensing Platforms for Precision Viticulture
Intercomparison of UAV, Aircraft and Satellite Remote Sensing Platforms for Precision Viticulture
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DOI：
10.3390/rs70302971
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发表时间：
2015-03-01
期刊：
影响因子：
5
通讯作者：
Gioli, Beniamino
中科院分区：
文献类型：
--
作者：
Matese, Alessandro;Toscano, Piero;Gioli, Beniamino
由于改进的和具有成本效益的数据采集和分析仪器和方法的可用性，例如无人机（UAV），由于低运营成本，高操作灵活性和高空间分辨率的图像，证明可以与传统的采集平台（如卫星和飞机）竞争，精密葡萄栽培正在经历大幅增长。为了优化这些技术在精准葡萄栽培中的应用，需要对其技术、科学和经济性能进行评估。这项工作的目的是比较无人机、飞机和卫星进行的NDVI调查，以评估每个平台代表葡萄园内植被空间变异性的能力。通过三个平台上不同的多光谱传感器同时获取两个意大利葡萄园的NDVI图像，并使用空间统计框架来评估它们的相似程度。此外，还评估了每种技术的优缺点，并进行了成本分析，作为应用规模的函数。结果表明，在植被梯度较大、植被集群较大的葡萄园中，不同平台的结果具有可比性。相反，在更异质的葡萄园中，低分辨率图像无法代表葡萄园内部的部分变异性。成本分析表明，采用无人机平台对小面积地区有利，并且在5公顷以上存在盈亏平衡点；在此阈值以上，机载和卫星的成像成本较低。
Precision Viticulture is experiencing substantial growth thanks to the availability of improved and cost-effective instruments and methodologies for data acquisition and analysis, such as Unmanned Aerial Vehicles (UAV), that demonstrated to compete with traditional acquisition platforms, such as satellite and aircraft, due to low operational costs, high operational flexibility and high spatial resolution of imagery. In order to optimize the use of these technologies for precision viticulture, their technical, scientific and economic performances need to be assessed. The aim of this work is to compare NDVI surveys performed with UAV, aircraft and satellite, to assess the capability of each platform to represent the intra-vineyard vegetation spatial variability. NDVI images of two Italian vineyards were acquired simultaneously from different multi-spectral sensors onboard the three platforms, and a spatial statistical framework was used to assess their degree of similarity. Moreover, the pros and cons of each technique were also assessed performing a cost analysis as a function of the scale of application. Results indicate that the different platforms provide comparable results in vineyards characterized by coarse vegetation gradients and large vegetation clusters. On the contrary, in more heterogeneous vineyards, low-resolution images fail in representing part of the intra-vineyard variability. The cost analysis showed that the adoption of UAV platform is advantageous for small areas and that a break-even point exists above five hectares; above such threshold, airborne and then satellite have lower imagery cost.