重复航空摄影测量方法在乌鲁木齐河流域冰川变化监测中的应用   总被引：19，自引：11，他引：19  

陈建明  刘潮海  金明燮 《冰川冻土》1996,(4)

介绍重复航空摄影测量对比成图方法在监测乌鲁木齐河流域冰川规模和形态要素变化中的应用，以及成图过程中对控制加密和精度等问题的处理。检验表明，航空摄影测量对比成图方法能较准确地量测冰川长度、面积和储量等全形态要素的变化量，可以用于区域冰川变化的监测研究。测量资料表明，１９６４～１９９２年间，乌鲁木齐河流域１５５条冰川的规模均在缩小，冰川末端平均后退率为１２．４％，面积平均缩小率为１３．８％，冰储量减少１５．５％。  相似文献   

基于摄影测量的GIS信息获取     

刘荣  李大军 《华东地质学院学报》1997,20(1):48-51

ＧＩＳ的功能之一是数据信息的采集与编辑，获取信息的手段有多种，本文着重探讨了利用摄影测量来获取信息的方法，原理及可行性，并取两种主要的数据信息形式获取及建库工作作了探讨。  相似文献   

数字摄影测量与计算机视觉   总被引：8，自引：2，他引：8  

张祖勋 《武汉大学学报(信息科学版)》2004,29(12):1035-1039,1105

从摄影测量的角度出发，在回顾摄影测量的发展历程及其最新进展的基础上，系统分析了数字摄影测量与计算机视觉的共同点及其本质差异，指出数字摄影测量的下一步发展必须与计算机视觉的理论和最新发展相结合。  相似文献   

A geomatics data integration technique for coastal change monitoring     

J. P. Mills  S. J. Buckley  H. L. Mitchell  P. J. Clarke  S. J. Edwards 《地球表面变化过程与地形》2005,30(6):651-664

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Estimation of regional material yield from coastal landslides based on historical digital terrain modelling     

C. J. Hapke 《地球表面变化过程与地形》2005,30(6):679-697

High‐resolution historical (1942) and recent (1994) digital terrain models were derived from aerial photographs along the Big Sur coastline in central California to measure the long‐term volume of material that enters the nearshore environment. During the 52‐year measurement time period, an average of 21 000 ± 3100 m³ km^?1 a^?1 of material was eroded from nine study sections distributed along the coast, with a low yield of 1000 ± 240 m³ km^?1 a^?1 and a high of 46 700 ± 7300 m³ km^?1 a^?1. The results compare well with known volumes from several deep‐seated landslides in the area and suggest that the processes by which material is delivered to the coast are episodic in nature. In addition, a number of parameters are investigated to determine what influences the substantial variation in yield along the coast. It is found that the magnitude of regional coastal landslide sediment yield is primarily related to the physical strength of the slope‐forming material. Coastal Highway 1 runs along the lower portion of the slope along this stretch of coastline, and winter storms frequently damage the highway. The California Department of Transportation is responsible for maintaining this scenic highway while minimizing the impacts to the coastal ecosystems that are part of the Monterey Bay National Marine Sanctuary. This study provides environmental managers with critical background data on the volumes of material that historically enter the nearshore from landslides, as well as demonstrating the application of deriving historical digital terrain data to model landscape evolution. Published in 2005 by John Wiley & Sons, Ltd.  相似文献   

The dynamic characteristics and migration of a pyramid dune   总被引：6，自引：0，他引：6  

TAO WANG  WEIMIN ZHANG  ZHIBAO DONG  JIANJUN QU  ZHEFAN JING  WANFU WANG  JIANMIN FENG 《Sedimentology》2005,52(3):429-440

The results of wind tunnel experiments and field observations show that when the intersection angle between airflow direction and dune crest (ridge) line is > 30°, a reverse vortex is formed. Because of the convergence of sand streams from the windward and lee slopes at the crest, sand accumulates in the crestal region, causing vertical growth. Nevertheless, studies also show that the common asymmetry of the two slopes of a dune may significantly influence the evolution of arms of a pyramid dune. The migration rates of pyramid dunes are mediated by the interplay of their arms moving transversely and the vertical growth in response to the variations in wind regimes. Comparing the effects of airflow transverse to a given arm with longitudinal airflow, it is indicated that the transverse airflow is more significant in controlling the arms of pyramid dunes. The whole body of the studied pyramid dune, particularly the upper quarter section, migrated SE direction during the monitoring period. The patterns of wind erosion and deposition change alternately with seasonal variations in wind directions. The W, NE and SE sides undergo constant erosion, deposition and both erosion and deposition, respectively. The results of long-term monitoring of a pyramid dune show that southerly winds, resulting from a local circulation, markedly affect the transverse migration of the whole pyramid dune.  相似文献   

Role of the Kazerun fault system in active deformation of the Zagros fold-and-thrust belt (Iran)     

Christine Authemayou  Olivier Bellier  Dominique Chardon  Zaman Malekzade  Mohammad Abassi 《Comptes Rendus Geoscience》2005,337(5):539-545

Field structural and SPOT image analyses document the kinematic framework enhancing transfer of strike-slip partitioned motion from along the backstop to the interior of the Zagros fold-and-thrust belt in a context of plate convergence slight obliquity. Transfer occurs by slip on the north-trending right-lateral Kazerun Fault System (KFS) that connects to the Main Recent Fault, a major northwest-trending dextral fault partitioning oblique convergence at the rear of the belt. The KFS formed by three fault zones ended by bent orogen-parallel thrusts allows slip from along the Main Recent Fault to become distributed by transfer to longitudinal thrusts and folds. To cite this article: C. Authemayou et al., C. R. Geoscience 337 (2005).  相似文献   

真三维立体显示技术在不动产登记统一平台中的应用研究     

陈育新 《测绘与空间地理信息》2016,(5):107-109

随着国家不动产统一登记制度的实施,城市房屋、林地、草原、土地等不动产统一整合、调查和管理工作迫在眉睫。基于机载多角度倾斜摄影和激光雷达扫描技术的创新,真三维数据可为不动产登记提供真实统一、高精度、多层次的空间载体,保证了城市不动产登记应用创新和制度创新。  相似文献   

基于Leica XPro系统的ADS80数字影像空三加密方法研究     

王香茗  刘杰  崔永利 《测绘与空间地理信息》2016,(6)

ADS80航空摄影测量系统作为新一代的数字摄影系统,其获得的高分辨率航空影像已经广泛应用于我国各行业的基础建设项目中。Leica XPro系统是对ADS80影像数据做后续处理的主流软件之一,本文主要介绍了基于Leica XPro系统进行空三加密的流程,并对加密过程中可能遇到的一些问题加以分析和阐述。  相似文献   

多角度倾斜摄影技术在自动纹理映射上的应用     

王卿 《测绘与空间地理信息》2016,(10):198-200

利用多角度倾斜摄影技术获取的倾斜影像成果来更新和构建城市三维实景纹理映射成为数字城市建设中的一个重要应用。本文采用基于DLG和3Dmax生成的建筑物模型,结合SWDC-5的多角度倾斜影像,通过自动选择纹理、自动编辑纹理、自动纹理映射等一系列步骤,自动生成大区域建筑物三维实景数字城市。并通过实验数据对该计算方法的可靠性进行验证,结果表明:该系统的数字化程度远远高于传统方法。  相似文献