倾斜摄影测量技术作为一门近些年发展起来的摄影测量技术，在数字城市三维建模方面有了更多的应用。目前使用无人机拍摄地物倾斜影像建立实景三维模型，已经有了较成熟的技术方法和数据处理软件；针对实景三维模型进行测量生产的研究一直以来都是热点问题，它对实景三维模型进行矢量数字化有着很大的应用意义。借助 EPS平台软件，利用三维模型结合二维正摄影像图进行地形图绘制，突破了传统地形图绘制时需要实地调绘的限制，或需要借助立体眼镜观测多张相片在模拟立体模型上绘制的局限。本文针对该问题提出了一种大比例尺绘制地形图的方法，仅需要少量的外业测量，且不需要佩戴设备，在室内进行数据处理即可完成大比例尺地形图绘制作业。这种地形图绘制方式大大提高了生产效率，减少了人力成本，具有很高的测绘作业生产参考价值。 对三维和二维模型进行数字化，其中对模型精度和人工测图精度有很高的精度要求。本文参考大量国内外相关文献和实验数据研究，分析了无人机倾斜摄影测量三维模型的精度，遵循无人机使用技术标准和相关法律，进行了无人机飞行实验；借助EPS软件分析了倾斜摄影三维模型的测图精度及不同绘制方式对绘制精度的影响。论文研究内容主要包括以下三个部分： （1）详细介绍了倾斜摄影测量的技术理论和无人机倾斜摄影测量的系统组成，并对倾斜摄影测量三维建模的关键技术影像匹配、空中三角测量、密集匹配、构建三角网、纹理映射等五个关键技术进行详细的介绍和分析。 （2）从理论上分析了倾斜摄影测量三维建模精度的主要误差来源，以岐山村和阿甘镇为实验区域，设计了无人机倾斜摄影测量实验，并对实验数据进行精度分析，根据空中三角测量精度指标，评价三维模型的精度。 （3）通过试验分析了地形图绘制过程中人为误差的精度，利用EPS进行地形图测图数据采集，设计评价地形图绘制精度的试验，分析二维和三维模型绘制大比例尺地形图的精度，最后总结利用三维模型结合二维模型进行大比例尺地形图绘制的方法。

Oblique photogrammetry technology as a photogrammetry technology developed in recent years, has more applications in the three-dimensional modeling of digital cities. At present, the use of drones to shoot three-dimensional models of real-time imagery to create realistic three-dimensional models, there have been more mature technology methods and data processing software; research on real-time three-dimensional model measurement and production has always been a hot issue, it carries on the real three-dimensional model Vector digitization has great application significance. With EPS platform software, the use of three-dimensional model and two-dimensional positive image map for topographic map drawing, breaking through the limitations of the traditional terrain map drawing needs to be painted, or need to use stereo glasses to observe multiple photos on the simulated three-dimensional model Limitations. This paper proposes a new method for large scale mapping of topographic maps for this problem. It only requires a small amount of field measurements and does not require equipment to be worn. Data processing within the room can be used to complete the mapping of large-scale topographic maps. This type of topographic map drawing method greatly improves the production efficiency, reduces the labor cost, and has a high reference value for the production of surveying and mapping operations. Digitizing three-dimensional and two-dimensional models, which have high accuracy requirements for model accuracy and accuracy of two-dimensional and three-dimensional model mapping. This article refers to a large number of domestic and foreign relevant literature and experimental data research, analyzes the accuracy of the three-dimensional model of tilt camera measurement of drones, follows the technical standards and relevant laws of drones, conducts drone flight experiments, and analyzes the tilt using EPS software. The Influence of Mapping Accuracy and Different Drawing Methods on the Drawing Accuracy of Photography Three - dimensional Models . The research content of the thesis mainly includes the following three parts: (1) The technical theory of tilted photographic measurement and the system composition of tilted photographic measurement for drones are introduced in detail. The key technologies for 3D modeling of tilted photographic measurements are image matching, aerial triangulation, dense matching, triangulation, texture mapping. Five key technologies are introduced and analyzed in detail. (2) Analyze the main error sources of 3D modelling accuracy of oblique photogrammetry theoretically. Take Yaoshan Village and A-Gan Town as experimental areas, design a drone inclination photogrammetry experiment, and analyze the accuracy of the experimental data. Aerial triangulation accuracy index, evaluation of the accuracy of three-dimensional model. (3) Analyze the precision of human error in the process of drawing topographic maps, use EPS to collect topographic map data, design and test the accuracy of topographic maps, and analyze the precision of 2D and 3D models for drawing large-scale topographic maps. Finally, the method of drawing topographic map using 3D model and 2D model is summarized.