3维最小二乘表面匹配泛型数学模型及在机载LiDAR条带平差中的应用     

左志权  刘正军  张力 《遥感学报》2013,17(6):1546-1558

以3维表面间共轭点欧氏距离之和最小为理论基础,提出一种泛型3维表面匹配数学模型,并推导其最小二乘平差理论模型,利用该模型进行机载LiDAR点云条带平差。针对真实机载LiDAR点云数据进行条带平差对比实验,结果表明本文所提出的表面匹配模型,不仅能准确估计出相邻重叠3维表面间的正形变换参数,较好地解决机载LiDAR点云条带间配准问题,而且能同时适用于多种同名点对应准则,是一种泛型的配准模型。  相似文献   

机载LiDAR数据逐航带平差与航带区域网平差对比   总被引：1，自引：0，他引：1  

王丽英  宋伟东 《测绘科学》2013,38(2):32-34

机载LiDAR系统获取的点云数据在经过预处理解算后仍会残余部分系统误差,因此,在利用点云数据生成DEM等相关数字产品之前,必须检查并改正这部分系统误差。以此为主要目标,本文对机载LiDAR数据的逐航带平差与航带区域网平差展开研究,并以Microsoft Visual Studio 2008 C++为开发平台、基于实测数据对比了两者在完成多航带构成的测区平差时的精度,结果表明:机载LiDAR数据的航带区域网平差方法相较于LZD算法可有效降低逐航带平差导致的误差累积,精度更高。  相似文献   

测量平差模型误差对平差结果的影响     

胡圣武 《测绘科学》2013,38(3):54-56,42

测量平差模型不仅包括函数模型还包括随机模型,因此要研究测量平差模型误差对平差结果的影响就要研究函数模型误差和随机模型误差二者同时的影响。本文以间接平差模型为例,随机模型误差、函数模型误差和随机模型误差三个层次研究了测量平差模型误差对平差结果影响的公式,论证了不同平差模型误差情况下的平差结果,并推导和论证了同时考虑函数模型误差和随机模型误差对平差结果影响的公式。  相似文献   

利用激光测距数据处理线阵卫星摄影测量影像   总被引：1，自引：0，他引：1  

王建荣  王任享  胡莘  王新义 《测绘科学》2013,38(2)

以线阵CCD测量相机为有效载荷的传输型卫星是目前获取影像的有效途径。本文针对两线阵卫星影像摄影测量处理的相关问题,提出将激光测距数据用于相机焦距在轨标定和光束法平差的理论及数学模型,并进行了实验验证。实验表明利用激光测距数据参与两线阵影像处理,能够满足测制1∶10 000比例尺地形图精度要求。  相似文献   

基于过程的面向对象时空数据模型数据组织方法   总被引：1，自引：0，他引：1  

李景文  邹文娟  田丽亚  农佳捷  苏浩 《测绘科学》2013,38(5):100-102

本文在分析现有时空数据模型和面向对象方法的基础上,提出了基于过程的面向对象时空数据模型,该模型从时空语义建模的角度反映空间对象的演变过程,以及在这个过程中产生的事件因果联系,并且通过过程语义和面向对象思想两者的结合解决了时空动态数据的组织、存储和查询问题。  相似文献   

Integrated navigation system and experiment of a low-cost and low-accuracy SINS/GPS     

Xueyuan Lin  Jin Xu  Min Zhou 《地球空间信息科学学报》2013,16(3):177-180

When SINS (strap-down inertial navigation system) is combined with GPS, the observability of the course angle is weak. Although the course angle error is improved to some extent through Kalman filtering, the course angle still assumes a divergent trend. This trend is aggravated further when using low-cost and low-accuracy SINS. In order to restrain this trend, a method that uses AHRS to substitute for SINS course angle information is put forward aimed at the hardware component characteristic of the low-cost and low-accuracy SINS including AHRS (attitude and heading reference system) and IMU (inertial measurement unit). Real static and dynamic experiments show that the method can restrain the divergent trend of the navigation system angle effectively, and the positioning accuracy is high.  相似文献   

Rank-defect adjustment model for survey-line systematic errors in marine survey net     

Liu Yanchun  Li Mingsan  Huang Motao 《地球空间信息科学学报》2013,16(4):14-20

In this paper, the structure of systematic and random errors in marine survey net are discussed in detail and the adjustment method for observations of marine survey net is studied, in which the rank-defect characteristic is discovered first up to now. On the basis of the survey-line systematic error model, the formulae of the rank-defect adjustment model are deduced according to modern adjustment theory. An example of calculations with really observed data is carried out to demonstrate the efficiency of this adjustment model. Moreover, it is proved that the semi-systematic error correction method used at present in marine gravimetry in China is a special case of the adjustment model presented in this paper.  相似文献   

Possibilities of GPS kinematic measurements for geological survey in East Slovakia     

Vladimír Sedlák  Viera Hurčíková  Soňa Molčíková 《地球空间信息科学学报》2013,16(4):21-25

This paper deals with transformation procedures for observed GPS data from the world geodetic system WGS-84 into the national geodetic grid datum S-UTCN (system of united trigonometric cadaster network) and Baa (the Baltic Sea after adjustment). Transformation from WGS-84 into SUTCN is performed most frequently by means of the 7-element Helmert transformation with three identical points. Geodetic network was adjusted by two ways.  相似文献   

System structure and calibration models of intelligent photogrammetron     

Pan Heping  Zhang Chunsen 《地球空间信息科学学报》2013,16(2):48-54

This paper describes the structure, geometric model and geometric calibration of Photogrammetron I—the first type of photogrammetron which is designed to be a coherent stereo photogrammetric system in which two cameras are mounted on a physical base but driven by an intelligent agent architecture. The system calibration is divided into two parts: the in-lab calibration determines the fixed parameters in advance of system operation, and the in-situ calibration keeps tracking the free parameters in real-time during the system operation. In a video surveillance set-up, prepared control points are tracked in stereo image sequences, so that the free parameters of the system can be continuously updated through iterative bundle adjustment and Kalman filtering.  相似文献   

Interrelations between socio-economic development and environmental quality: a simulation integrating system dynamics models with GIS     

Yu Jie  Bian Fuling  Peterson Jim  Li Pingxiang 《地球空间信息科学学报》2013,16(3):176-182

System dynamics (SD) theory has long been deployed in modeling complex non-linear interrelationships but, so far it has not been common to do the kind of modeling in support of bringing environmental sustainability policies to practice. This is largely because the challenge of including spatial data has not yet been well met. Potential for adoption of SD and GIS methods in combination is exemplified with the results of a decision-support exercise designed for simulation and prediction of the dynamic inter-relationships between socio-economic development and environmental quality for the “Wen, Pi, Du” county in Sichuan province, southwestern China.  相似文献