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Research of Airborne LIDAR Data Processing with Multiple Data

Author: LiuPei
Tutor: LiYingCheng
School: Chinese Academy of Surveying and Mapping
Course: Photogrammetry and Remote Sensing
Keywords: LIDAR Gross errors Filtering Interpolation method Digital Elevation Model
CLC: P23
Type: Master's thesis
Year: 2008
Downloads: 920
Quote: 21
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Abstract


With the increasing demand for spatial information, the concept of \LIDAR (Light Detection And Ranging) is an active earth observation system, integrated GPS, inertial navigation, advanced laser ranging technology has less control measurement dependent, little affected by weather, high degree of automation, in Fig. short cycle, may bring a new technological revolution (Jingnan, 2003) for the mapping industry. LIDAR applications boom has been set off in a foreign country, and also introduced the airborne equipment for commercial operation, but the data processing method of the technology is still in the research stage, is still in the exploratory stage adaptive algorithms for different terrain conditions, the laser altimetry industry standards in a blank state. How to make this high-tech play an active role in the national economy, how to change the situation of domestic development is lagging behind in the field, presented new challenges to the surveyors. This paper studies the airborne LIDAR data processing theory and methods, based on analysis and summarizes the principles and characteristics of the LIDAR technology to explore the key technology of airborne LIDAR data processing, and introduces the concept of a multi-source data-aided analysis. The details are as follows: 1. Analysis of the principle of LIDAR earth observation, technical superiority, at home and abroad, the development status and application areas, and summarized the main commercial LIDAR system technical indicators, compared airborne LIDAR technology the similarities and differences between the advantages and disadvantages of photogrammetry technology, airborne InSAR technology; 2. discussion of the characteristics of airborne LIDAR data and data organization, and describes proposed by ASPRS Lidar Data Exchange Format Standard 1.0 and 1.1 standard file formats, the importance of open The data format has great significance to strengthen the communication system providers and software developers to expand the application of LIDAR technology; 3. airborne LIDAR data preprocessing quality evaluation methods and gross error analysis methods mainly based on the strips. The critical point, histogram, outlier Shading Map gross error analysis methods for the follow-up of digital surface model generation and lidar data processing work to provide early support; 4. systematic review and summarize the airborne LIDAR data filtering principle and commonly used methods, and the use of a known DEM the auxiliary new algorithm for LIDAR point cloud iterative process, while in the other regions of the city, mountains, waters experimental; triangulated irregular network the Shading Map, rules the grid shaded relief maps, cross-sectional view of the point cloud, aerial imagery data assisted interpretation and recognition, to achieve accurate and efficient data processing quality checks with manual editing process; 6. comparing the results of the application of laser point cloud data post-processing to generate digital surface models and digital elevation model interpolation algorithm; 7. through orthophoto corrected, real shot video production and urban three-dimensional fast modeling experiments explore the feasibility and technical advantages of lidar data applications.

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > Photogrammetry and Surveying, Mapping and Remote Sensing
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