Navigating Urban Areas by VISAT—A Mobile Mapping System Integrating GPS/INS/Digital Cameras for GIS Applications
Navigating Urban Areas by VISAT—A Mobile Mapping System Integrating GPS/INS/Digital Cameras for GIS Applications
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DOI：
10.1002/j.2161-4296.1998.tb02387.x
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发表时间：
1998-12
影响因子：
--
通讯作者：
N. El-Sheimy;K. Schwarz
中科院分区：
文献类型：
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作者：
N. El-Sheimy;K. Schwarz
在简要介绍 VISAT（视频、惯性和卫星 GPS）（用于在城市中心建立地理信息系统 (GIS) 的移动测量系统）之后，讨论了系统的质量控制组件和性能分析结果。在卡尔加里、丹佛和拉瓦尔市的测试网络中收集的数据用于评估系统性能的准确性和可靠性，并为导航传感器开发实时质量控制算法。特别关注通过应用独立惯性导航系统 (INS) 轨迹数据来检测和修复 GPS 周跳。在城市中心，由于树木覆盖和建筑物遮挡，频繁的自行车滑行是常态而不是例外，INS 桥接的有效性对于整体性能至关重要。结果表明，系统符合规格，并且在许多情况下性能优于指定值。
Following a brief system description of VISAT (Video, Inertial, and SATellite GPS), a mobile survey system for the establishment of geographic information systems (GIS) in urban centers, the quality control component of the system and results of a performance analysis are discussed. Data collected in test networks in Calgary, Denver, and Laval City are used to assess system performance in terms of accuracy and reliability, and to develop a real-time quality control algorithm for the navigation sensors. Special attention is given to detecting and fixing GPS cycle slips by applying independent inertial navigation system (INS) trajectory data. In urban centers where, because of tree coverage and shading by buildings, frequent cycle slips are the rule rather than the exception, the effectiveness of INS bridging is crucial for overall performance. Results show that system specifications have been met, and in many cases performance is better than specified.