Land is the basis for human beings to engage in economic and social activities, but the continuous acceleration of the process of economic development and urban expansion has brought about a series of ecological and urban problems. Therefore, the simulation of urban spatial expansion is very important for the rational planning of urban land and the promotion of sustainable urban development. The three-dimensional visualization of urban land allows users to have a perceptual understanding of urban construction, and enables decision makers, designers and users to have a more vivid and rational understanding of the current state of urban construction and planning and design blueprints. Based on this, this article combines three-dimensional imaging and Internet of Things technology to carry out the research on urban land utilization. First of all, this article discusses image modeling techniques such as texture mapping and panoramas, and applies these techniques to the model reconstruction of complex urban land. The model effectively combines graphics-based and image-based model reconstruction technology to construct a highly realistic three-dimensional urban landscape. Secondly, this article combines the Internet of Things and wavelet analysis to design an Internet of Things architecture for urban land use efficiency management. Finally, on the premise of taking into account the important results and the status quo of urban development, the countermeasures and suggestions for increasing the urban land use rate are put forward.

土地是人类从事经济和社会活动的基础，但经济发展和城市扩张进程的不断加速，带来了一系列生态和城市问题。因此，城市空间扩展模拟对于城市用地的合理规划和促进城市可持续发展具有十分重要的意义。城市用地三维可视化，让用户对城市建设有感性认识，让决策者、设计师和用户对城市建设现状和规划设计蓝图有更生动、理性的认识。基于此，本文结合三维成像和物联网技术，开展城市土地利用研究。首先，本文讨论了纹理映射和全景图等图像建模技术，并将这些技术应用于复杂城市土地的模型重建。该模型有效地结合了基于图形和基于图像的模型重建技术，构建了高度逼真的三维城市景观。其次，本文结合物联网和小波分析，设计了一种用于城市土地利用效率管理的物联网架构。最后，在兼顾重要成果和城市发展现状的前提下，提出了提高城市土地利用率的对策建议。该模型有效地结合了基于图形和基于图像的模型重建技术，构建了高度逼真的三维城市景观。其次，本文结合物联网和小波分析，设计了一种用于城市土地利用效率管理的物联网架构。最后，在兼顾重要成果和城市发展现状的前提下，提出了提高城市土地利用率的对策建议。该模型有效地结合了基于图形和基于图像的模型重建技术，构建了高度逼真的三维城市景观。其次，本文结合物联网和小波分析，设计了一种用于城市土地利用效率管理的物联网架构。最后，在兼顾重要成果和城市发展现状的前提下，提出了提高城市土地利用率的对策建议。