Organic tea farms promote biodiversity and perform important ecological functions that benefit the environment and supply safe and secure products to consumers. The study of organic farming requires field study to identify and collect species on site. I proposed the use of aerial photography obtained by an unmanned aerial vehicle (UAV) to identify tea farms that provided a habitat for spiders. In this study, two locations were selected in tea farms near the town of Wazuka, in Kyoto Prefecture, Japan. Aerial photographs were taken after confirming conditions on the ground were right for maximum contrast because the spider webs appearing white when the right atmospheric conditions highlight fine water droplets adhering to the strands in the webs. This occurs when the temperature and humidity combine in such a way as to cause moisture to condense from the atmosphere, also known as the dew point. When this occurs, the webs appear white in daylight and are easily identified by visual orthomosaic images obtained from the UAV. The spatial distribution of spider webs varied as a function of farming method used in different sections of the farms. The results of the visual analysis showed that the density of spider webs correlates with the type of farming method. Sections in which organic farming methods were practiced showed the highest density of webs, followed by sections of conventional farming (extensive cultivation), and lastly, sections using conventional farming methods had the lowest density of webs. The density was easily estimated from orthomosaic images constructed from aerial photographs and demonstrated that organic tea farms can be distinguished from farms employing conventional farming methods based on this criterion.

有机茶园可促进生物多样性并执行重要的生态功能，从而有益于环境并向消费者提供安全可靠的产品。对有机农业的研究需要进行现场研究，以在现场识别和收集物种。我建议使用无人飞行器（UAV）拍摄的航空摄影来识别为蜘蛛提供栖息地的茶园。在这项研究中，在日本京都府和鹿市附近的茶园中选择了两个地点。确认地面条件正确以获得最大对比度后，进行了航拍，因为在适当的大气条件下，蜘蛛网会显示白色，这表明附着在网中股线上的细小水滴。当温度和湿度以导致水分从大气中凝结的方式（也称为露点）结合时，就会发生这种情况。发生这种情况时，这些网在日光下会显示白色，并且很容易通过从无人机获得的视觉正交图像来识别。蜘蛛网的空间分布随农场不同区域使用的耕作方法而变化。视觉分析结果表明，蜘蛛网的密度与耕作方法的类型相关。实行有机耕作方法的区域显示的网片密度最高，其次是常规耕作（粗耕）的区域，最后，使用常规耕作方法的区域的网片密度最低。