UCD/UCX数码相机在西南某地区航摄中的应用研究

本文利用西南某地区的UCD/UCX数码航摄资料,详细探讨了像片控制点的布设方案、空三加密精度与DOM/DLG成图精度的关系,为UCD/UCX数码航摄相机的应用提供了参考。     

数码影像生产3D数字产品的成图精度分析

随着数码航摄影像在测绘生产中的广泛使用,测绘生产单位运用这种新型数据源进行了大量的数字产品生产,但是其精度如何,是否满足规范要求值得研究。选取已完成的部分数码影像测图项目作为试验区,对3D数字产品成果进行精度统计和分析,试验结果表明,数码航空影像制作的3D数字产品的平面精度和高程精度能够满足《1∶5001∶10001∶2000地形图航空摄影测量内业规范》的技术要求,为生产单位承接数码影像项目提供了生产技术依据。     

UCD航摄像片在大比例尺地形图中的应用

本文阐述了UCD数码航摄相机的原理、功能及优点,结合在生产中的应用实践,分析了UCD数码航摄像片的成图精度.     

基于UCX数码影像的平坦地区控制点布设方案研究

数码航空摄影技术带来的优质图像及其高清晰度使数字摄影测量的匹配、影像调节、镶嵌等工作的自动化程度显著提高,加快了测图进度,提高了生产效率。在研究基高比对高程精度影响的基础上,结合影像分辨率、航高、焦距、航摄技术等因素,根据同一区域网采用不同外业像控点布设方案及空三加密试验结果,分析、归纳符合平坦地区航空摄影测量规范精度要求的基于UCX数码航空影像的控制点布设方案。     

基于ADS80制作武汉市1︰10000数字高程模型

介绍了利用ADS80推扫式数码航空影像生产武汉市1︰10 000 DEM的过程,并利用现有的数字线划图数据对其进行精度评定。检查结果表明,其精度均满足规范要求。     

利用SWDC-4数码航空影像的1:5000、1:10000平地像控布点研究

数码航空摄影技术已日趋成熟,数码航空影像因其高分辨率、低成本、高效率等优势已在测绘地理信息领域得到广泛应用。选取SWDC-4数码航空影像,在研究基高比对高程精度影响的基础上,进行像片控制点的布设和空三加密试验,并对影像分辨率、航高、焦距、航摄技术及外业像控点分布等进行分析总结,提出满足1:5000和1:10000航空摄影测量规范平地精度要求的适宜航高和控制点布设方案。     

数码航摄影像在摄影测量中的应用

新型航空摄影仪在摄影测量中的应用已经成为大势所趋。针对新型数码航空影像在摄影测量应用中的高程精度和大重叠度摄影2个问题在理论上进行了分析和讨论,并使用实际数据进行空中三角测量试验,证实在大重叠度数码航摄影像的空中三角测量作业中,只要适当选择影像的地面分辨率,并且连接点转点必须向所有可能的影像转点,是完全可以满足成图精度要求的。     

SWDC数码相机在大比例尺成图中的应用研究

以河南省焦作市城区1:1 000地籍图测绘为例,以SWCD数码航空影像为数据源,基于JX-4C DIS全数字摄影测量工作站,探讨并总结大比例尺数码航空测图的方法与技术流程.试验结果表明,该方法符合国家地籍测量的规范要求.     

基于MapMatrix系统的ADS80数字航测成图

以武汉市江夏区1∶2 000数字航测成图项目为例,探讨了利用ADS80三线阵数码航空影像进行数字航测成图的优势。结合MapMatrix系统强大的立体采集模块,设计了一套切实高效的数据采集生产流程。通过外业精度核查,成图平面与高程精度均满足城市测量规范要求。     

利用VirtuoZo和UCD快速制作正射影像的方法

提出了利用VirtuoZo系统并结合UCD相机的特点在立体环境下快速制作正射影像的方法。在研究区范围内,首先,利用无人机搭载UCD相机进行影像的获取,然后将获取的影像利用UCD相机参数和控制点参数等信息进行影像的粗纠正,接着在VirtuoZo系统中进行精纠正等处理,之后进行DEM的生成,最后可快速地进行DOM的制作。通过试验表明,该方法可快速获取精度较高的正射影像。     

数码航摄与传统摄影的比较探讨

结合DMC航空摄影数据和UCD像机的测试数据,将数码航摄与传统摄影模式进行了比较,总结了影响航摄数据质量的主要原因,并结合相关航空摄影规范,分析了数码航空摄影的数据质量及应用于传统航测生产中的优势与不足。     

DMC航摄影像外业像控布点的实验研究

外业像控及内业空三加密是摄影测量的基础工作,传统航摄资料在这方面有成熟的作法,而对数字航摄影像还没有制定相应的技术标准。本文通过分析DMC对外业像控及空三加密的技术要求,结合实验区分析DMC航摄资料特点,通过实验对DMC数字航摄资料的外业像控的布点方案、基线数量、点位位置等问题进行研究、分析和总结。     

PHOTOGRAMMETRIC DEVELOPMENTS IN THE ORDNANCE SURVEY IN 1990

The author, a research and development manager at Ordnance Survey, reviews current developments in photogrammetry including the automatic correlation of image points for aerial triangulation, digital photogrammetric map revision, mapping from SPOT imagery and progress in aerial photography.     

非量测数码影像在航测成图中的应用

如何加速成图周期,快速、高效地生产各种地理信息产品是摄影测量应用研究的主要内容.本文介绍了非量测数码航摄影像在全数字摄影测量工作站上进行地理信息产品生产的技术方法和工作流程,研究了关键技术环节.     

Image Sources for Informal Settlement Management

Informal settlements are a common feature of developing countries. In South Africa the improvement of living conditions in these settlements and the upgrading to formal housing types are regarded as being of central importance to the nation's development. Effective settlement improvement and upgrading activities, which we here term "management", require adequate spatial data. To date, the acquisition of spatial models of informal settlements has been based on conventional mapping techniques, and mostly on photogrammetry. Data are compiled using analogue or analytical methods. These are manual and hence require both considerable expertise and expensive equipment. Moreover, these methods are uneconomical over the often relatively small, densely populated areas covered by informal settlements and are also too expensive to employ with a regularity required to support such tasks as change detection. Alternative imaging sources and mapping techniques are therefore needed.
In this article we examine the problem of spatial information acquisition for informal settlement management from three perspectives: spatial information requirements, the role which imagery can play in satisfying these spatial information requirements, and effective imaging options. We focus on the potential of high resolution satellite imaging, small format digital aerial imagery and digital multispectral video systems for rapid mapping. We also discuss the example of automated shack extraction from aerial imagery.     

Building population mapping with aerial imagery and GIS data

Geospatial distribution of population at a scale of individual buildings is needed for analysis of people's interaction with their local socio-economic and physical environments. High resolution aerial images are capable of capturing urban complexities and considered as a potential source for mapping urban features at this fine scale. This paper studies population mapping for individual buildings by using aerial imagery and other geographic data. Building footprints and heights are first determined from aerial images, digital terrain and surface models. City zoning maps allow the classification of the buildings as residential and non-residential. The use of additional ancillary geographic data further filters residential utility buildings out of the residential area and identifies houses and apartments. In the final step, census block population, which is publicly available from the U.S. Census, is disaggregated and mapped to individual residential buildings. This paper proposes a modified building population mapping model that takes into account the effects of different types of residential buildings. Detailed steps are described that lead to the identification of residential buildings from imagery and other GIS data layers. Estimated building populations are evaluated per census block with reference to the known census records. This paper presents and evaluates the results of building population mapping in areas of West Lafayette, Lafayette, and Wea Township, all in the state of Indiana, USA.     

浅谈Geolord-AT空三格式导入PF的方法

像素工厂是新一代海量遥感影像处理系统,处理推扫式ADS数据"得心应手",但处理框幅数码影像如UCD,DMC等优势并不明显,尤其在加密方面。Geolord-AT是数字摄影测量工作站JX4C DPS的子项目,处理框幅数码影像如UCD,DMC等优势明显。故将二者结合,通过生产实践,提高了生产效率。     

REMOTE SENSING IN THE MORPHOMETRIC ANALYSIS OF CHANNELS AND FLOODPLAINS

The first of two papers devoted to the analysis and mapping of river channels and floodplains describes Soviet work in the photogrammetric and cartometric analysis of floodplain morphology based on remote sensing imagery. The emphasis of the present paper is on the creation of digital terrain models for the automated measurement and mapping of floodplain features. Considerable attention is focused upon analysis of indicators of channel and floodplain dynamics (channel deposition, bankside erosion, meanders) appearing on aerial photographs. The results of channel analyses based on aerial photographic and field methods (determinations of channel width, depth, etc.) are compared for a test site. Translated from: Geomorfologiya, 1986, No. 4, pp. 51-57.     

ADS 80航空摄影测量系统的特点与应用

仪器设备状况是航空摄影测量技术发展水平的标志。徕卡ADS 80基于航天传感器线阵扫描和全球定位系统、高精度的惯性导航定向系统（IMU）获取数字影像,利用该传感器进行航空摄影,不需经过扫描,就可以直接为数字摄影测量、遥感图像处理系统提供高分辨率的全色、真彩色、近红外数字影像,能够实现DLG数据的快速采集。与以往基于像对的...