Globally, there is a rapid development of urban heat island (UHI) detection tools, and their results can be accepted regardless of their accuracy in measuring the real impact of the phenomenon. In this study, we investigated various UHI measuring tools and analysed their findings to better interpret their reliability. The tools in the current research adopted remote sensing and field measurements including those using air temperature monitors and thermal imaging technologies to examine the multiple urban structures of four cases in the Greater Cairo Region. The results showed that UHI detection by remote sensing analysis was affected by normalised difference vegetation index. In contrast, field measurements were also influenced by the albedo of morphological materials present. The conclusions revealed that the tools do not provide the same results and indicate that studying UHIs in the built environment differs from investigating it in a two-dimensional layer using remote sensing.

在全球范围内，城市热岛 (UHI) 检测工具发展迅速，无论其在测量该现象的实际影响方面的准确性如何，都可以接受其结果。在这项研究中，我们调查了各种 UHI 测量工具并分析了他们的发现，以更好地解释其可靠性。当前研究中的工具采用了遥感和实地测量，包括使用气温监测器和热成像技术来检查大开罗地区四个案例的多个城市结构。结果表明，遥感分析UHI检测受归一化差异植被指数的影响。相比之下，现场测量也受到存在的形态材料的反照率的影响。