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首页> 外文会议>Asian conference on remote sensing;ACRS 2007 >HIGH-ACCURACY POSITIONING FOR LAND-BASED MOBILE MAPPING SYSTEM BY FUSING MULTI-SENSOR DATA
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HIGH-ACCURACY POSITIONING FOR LAND-BASED MOBILE MAPPING SYSTEM BY FUSING MULTI-SENSOR DATA

机译：基于多传感器数据的陆基移动测绘系统高精度定位

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摘要

The demand of spatial data has been an explosive growth in the past 20 years. This demand has numerous sources and takes many forms, but it is an ever-increasing thirst for spatial data, which is more accurate and higher density (Called as High-Definition Spatial Data), which is produced more rapidly and acquired less expensively.The land-based mobile mapping system can satisfy with the high demands for the spatial data. But the accuracy of a GPS-based positioning system for mobile mapping system is depended on the environment conditions like multi-pass and obstacle problems. In some cases, the mapping accuracy of a GPS-based positioning system will reach meter order. Such a positioning accuracy usually can not meet the demand of high definition mapping. In order to get the high and stable accuracy, Multi-sensor data fusion based photogrammetry bundle adjustment technology is developed and described in this study. The photogrammetry bundle adjustment is proofed as a powerful technology for improving mapping accuracy in the field of Aerial photogrammetry. However in traditional bundle adjustment, automatic extraction of tie point is a well-known difficult task, which affects speed and robust of the processing. Because laser can collect 3D coordinate directly, the information is very helpful for extracting tie points in stereo image rapidly and robustly. With co-ordinates of extracted tie points and initial position from navigation sensor, photogrammetric Bundle Adjustment is utilized for improving the mapping accuracy to 0.3 meter, which can meet the accuracy demand of high-definition mapping.
机译：在过去的20年中，空间数据的需求呈爆炸式增长。这种需求来源众多，形式多样，但对空间数据的需求却在不断增长，因为空间数据更准确，密度更高（称为高清晰度空间数据），因而生产速度更快，获取成本更低。 陆基移动制图系统可以满足对空间数据的高要求。但是，基于GPS的移动地图系统定位系统的精度取决于环境条件，如多路通行和障碍物问题。在某些情况下，基于GPS的定位系统的地图绘制精度将达到仪表的数量级。这样的定位精度通常不能满足高清映射的需求。为了获得较高且稳定的精度，本研究开发并描述了基于多传感器数据融合的摄影测量束调整技术。摄影测量束调整被证明是提高航空摄影测量领域中的制图精度的一项强大技术。但是，在传统的束调整中，自动提取连接点是一项众所周知的难题，这会影响处理的速度和鲁棒性。由于激光可以直接收集3D坐标，因此该信息对于快速，稳健地提取立体图像中的联系点非常有帮助。借助从导航传感器中提取的联络点和初始位置的坐标，摄影测量捆绑调整可将映射精度提高到0.3米，可以满足高清映射的精度要求。

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