| Aerial photography surveying has become an important method of acquiring spatial and attribute data, and photogrammetry has entered the stage of digital photogrammetry. However, as a bridge between the image acquisition and image processing, photograph is analog and film image. Through digital aerial photography technology without analog data, revolutionary progress in real digital photography will be achieved in image accuracy, operational efficiency, operational procedures, standards and norms and other operations. Digital aerial camera and near light digital aerial photography surveying system is the core of the development of digital photogrammetry.In this paper, the SWDC digital aerial camera design, technical specifications and their key technologies were firstly described. Contrasting foreign digital aerial cameras, the conclusion was taken that SWDC was superior in the field of elevation accuracy, ration between volume and weight, the angleof field-of-view, the field corner pixel cents and the Ration between baseline and height. Based on SWDC light digital aerial photography surveying system near ground are controlled by the Autonomous Flight Management Control System, which covered the route design, air navigation, spin to control exposure driven, the entire process of flight records. With intelligent position exposure, the functional requirements of the precision air operations were meet. The result with SWDC series digital aerial camera and light digital aerial photography surveying system near ground meet the requirements of aerial photography with from scale 1: 500 to 1:10000 map. Their elevation accuracy is significantly higher than the result with foreign digital aerial cameras. Finally, the application of PPP technology in digital aerial photographic surveying and sparse ground control point technology are test. The results showed The accuracy of PPP is similar to the accuracy of differential GPS16 types of sparsely ground control point plantedvarious programs also was proved to meet the requirements of large and medium-scale map, which guided how to plant sparsely ground control point for the digital aerial photography surveying. This paper is divided into six chapters on the various aspects described above.Chapter I : Introduction, In this chapter, first the status and urgent issues of photographic surveying have been explored in greater depth. In addition, the digital aerial camera process and aviation research and developing the digital aerial camera and light digital aerial photography surveying system near ground with China's own intellectual property rights are important for the in-depth and extensive application in detail. Based on the contents described above, research contents and ideas are expounded and the basic framework of this thesis is established in this chapter.Chapter II, SWDC Camera Series Design and technology Realization: In this chapter, the analysis in-depth of specific technical status andoperational obstacles of the digital aerial camera are conducted. Furthermore, Ration between volume and weight, the angle of field-of-view, the field corner pixel cents, the Ration between baseline and height, the internal overlap rate and images shape are need improving. To solve the above problem, on the basis of the experiences of all kinds of aerial camera, SWDC design and a number of methods to improve technical are brought up. SWDC design principles and technology realization , the technical to improve digital aerial camera technical indicators SWDC structure* working principle, SWDC digital aerial camera calibration and stability of SWDC hardware are focused in the chapterChapter III SWDC flight management and control technology: The flight management and control subsystem is important and core to success to aerial works by digital aerial camera and data followed processing, which keeps direct impact the success or failure of digital aerial photography, including Operational efficiency and precision of operations by the digital aerial camera and light digital aerialphotography surveying system near ground. The digital aerial camera technology programs and the entire process of flight control SWDC are discussed in detail in this chapter, including main route design, computer control center, to control the spin, the center control platform and intelligent exposure technology, precise control of air operations and etc.Chapter IV, SWDC digital images preprocessing: there is a huge difference in image composition, Projection and other areas between digital aerial camera and digital optical analog camera in the traditional. To make the image which is acquired by SWDC digital aerial camera handled by traditional existing digital photogrammetry workstation, these image must be preprocessed. The digital image processing systems status, uniform color images, virtual imaging generation and the digital photogrammetric workstation technology foresight are described in detail in the chapter. The basic tenets and technology program of the optical absorption uniform color images and SWDC virtualimaging generating are expounded and we foresee how real digital photogrammetry workstation develops. Chapter V digital aerial photography surveying systems operation and precision analysis : all the design and technical process about air digital cameras and light digital aerial photography surveying system near ground must be test through field operations, the stability efficiency and precision of operations will directly determine success of SWDC. By SWDC-1, SWDC-2 or SWDC-4 with many sorts of flying platform large and medium-scale mapping of field operations (1:500,1 : 1000,1:2000,1:5000,1:10000) are carried out, and the result and their precision are comparatively analyzed. So SWDC program design and technical process are verified the feasibility. The experimental results show that many technical indicators of digital aerial camera and light digital aerial photography surveying system near ground are made a breakthrough compared to the foreign systems. With greater adaptability, the digital aerial camera and light digital aerial photography surveyingsystem near ground fully meet nation large and medium-scale mapping operations precision.Chapter VI : PPP in the digital aerial photography and control points of emplacement: PPP the principles and techniques of digital aerial photographicsurveying methods are expounded in the chapter。 The result carrier phase in Yibin in Sichuan and Badaling are contrasted, which suggested that the PPP can conduct an independent measurement of digital aerial photography after calculating. Eight control points emplaced on the sparse precision analysis, Regional photography which can be different in different emplaced sparse control points, increase the efficiency of digital aerial photographic surveying Chapter VII : Conclusions and Outlook:The research result about digital aerial camera and light digital aerial photography surveying system near ground is conclude in this chapter. The technical progress and existing technical problem about SWDC digital aerial camera and light digital aerial photography surveying system near ground are indicated. Furthermore the innovation in this paper is broughtup. Finally, we give the work of the relevant follow-up views.
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